A new Iranian government that Ayatollah Ruhollah Khomeini hopes to establish would ban the U.S. use of Iran as a base for intelligence monitoring of the Soviet Union, one of the religious leader's closest aides said today.

"We're not going to be an intelligence base for anyone," Sadegh Ghotbzadeh told an impromptu press conference at Khomeini's headquarters outside Paris.

As far as the religious movement is concerned, Ghotbzadeh said, Iran is pulling out of all regional defense pacts to which it belonged, including the Central Treaty Organization.

Earlier, Khomeini himself emphasized the need for the restoration of order in a message to his followers in Iran. He called on "the youth to cooperate with the part of the army that has rejoined the people to avert chaos and disorder."

At the same time, however, the 78-year-old Shiite Moslem leader said in his message: "I call on the Iranian people to carry on and redouble their strikes and demenstrations in order to bring about the downfall of this illegal government."

Khomeini's movement has information that U.S. military advisers in Iran are removing advanced warplanes and other sensitive equipment that the United States sold to the shah, Ghotbzodeh said in an interview later. a

He denounced this as theft of Ir1nian property, but said that Khomeini's provisional government, once it is in place, would not demand the equipment back, provided the United States refunds what Iran paid for it.

The Khomeini aide said the Americans were taking away 80 Grumman F14s and 13 Boeing KC135 aerial refueling planes. Iran also has 160 even more advanced F16s on ordr from the United States at a cost of $3.8 billion.

The ayatolloh's associate said that neither his chief nor anyone in his entourage has had any contacts with U.S. officials since coming to France in October.

Ghotbzadeh said he has reduced his estimate of the likelihood of an Iranian military coup from the 50-50 chance that he cited a few days ago to about 25 in 100. The reason, he said, is that important parts of the army have communicated their willingness to work with Khomeini.

If the government of Premier Shahpour Bakhtiar were to order the army to suppress Khomeini's Provisional Revolutionary Islamic Council or the provisional government that the council is supposed to name, the army would split and there would be civil war, the aide said.

The need for order in Iran now seems to be the overwhelming concern in the entourage of the ayatollah. The greatest concern, Ghotbzadeh said, is how to organize Khomeini's arrival in Iran so that millions of people do not descend on Tehran to greet him.

"Those who love him may crush him," he said. "We have to persuade the people to stay home."

In addition, the ayatollah wants the provisional government to be in place before he returns, Ghotbzadeh said.

The provisional government will contain no representatives of parties, he said, although party leaders could serve as individuals. The aide said that the parties would be free, however, to present candidates in general elections to be held under a new constitution, perhaps within two months.

Tudeh, the Iranian Communist Party that has been illegal under the shah, also will be free to run candidates, Ghotbzadeh said.

"The best way to isolate them is make them visible," he said. "Otherwise, they claim great power and influence, and they look like martyrs. Let their vote be counted in free elections. It was never much at their best times... but they agitate a lot and are organized."

He dismissed anxiety expressed in Western circles here that Tudeh and other leftists are beginning to take a leading role in pro-Khomeini demonstrations.

He also said that a Khomeini-in-spired government would practice "strict neutrality" and that there would be no danger of it falling in the Soviet sphere because it would need nothing from the Soviet Union, least of all arms.

He also said that, while Khomeini's movement has no intention of meddling in Soviet internal affairs, it does intend to press its views among its Soviet Moslem coreligionists and Persian-speaking minorities in the Soviet Union.

"We intend to propagate the depth and dimensions of our movement," he said. "We have the same right to propagate our views as the Soviets have for their ideology."

He said that the introduction of a true parliamentary democracy in Iran should create the conditions for "sensible relations with the West, guarding our independence totally, of course." The new constitution will respect the general principles of the Islamic religion, he said, but added that these are compatible with traditional democracy.

The main differences, he said, will be abolition of the monarchy and the Senate, half of whose members are appointed by the shah, and more stress on social justice and individual freedoms.

He said the revolutionary council will be dissolved as soon as a regular governmnet is named, but that Khomeini will remain as "the guide of the nation."

Khomeini said in his declaration today that the shah "will soon be judged" -- apparently meaning that he will be tried in absentia. Ghotbzadeh said imprisoned former prime minister Amir Abbas Hoveyda, jailed by the shah after years of faithful service, will "definitely" be put on trial.

The aide said only "25 or 30" of the top generals -- "who are hated by the army anyway" -- would have to be purged from the army, but that it would be reformed into a mobile defense force for the defense of the country's frontiers "rather than instrument for the maintenance of power."

He said that SAVAK, the shah's hated secret police, would be disbanded and that its members who tortured prisoners would be tried. But he stressed that they and all the others, if possible, would be tried by regular courts.

Khomeini's movement does not, he said, want to create the precedent of special tribunals to administer expeditive justice.

In his public appearance, Ghotbzadeh said that the Islamic republic would respect religious minorities, including Jews and Bahai, a group that has been heavily persecuted in Iran.