Prince Norodom Sihanouk asked the U.N. Security Council tonight to condemn Vietnam for its invasion of Cambodia and appealed to all nations to consider "effective measures" including aid cutoff to Hanoi until Vietnamese forces are withdrawn from his country.

The former Cambodia head of state, now representing the deposed Communist government of Premier Pol Pot, asked the council to deny U.N. credentials to the new Phnom Penh government, which assumed power with Vietnamese military assistance last weekend.

Sihanouk, a quintessential survivor who lived under virtual house arrest during Pol Pot's three-year rule, was allowed to address the council after an afternoon of procedural wrangling between teh Soviet Union and China. Moscow supports the new government in Phnom Penh while Peking was the sole ally of the deposed government.

Immediately after Sihanouk's address, China introduced an eight-point resolution asking the council to condemn Vietnam. The resolution also demandedwithdrawal of Vietnamese forces from Cambodia and called on all U.N. agencies, governments and interntional organizations to suspend aid to Vietnam.

It was the first time that China had placed a resolution before the Security Council since it become a U.N. member in 1972. China's demands were practically identical to the demands made by Sihanouk.

There was little chance that China's resolution would be adopted since the Soviet Union, which supports Vietnam and the new government in Phnom Penh, can veto the measure.

Replying to Sihanouk's charges, Vietnam Ambassador Ha Van Lau said that Cambodian insurgents have deposed the "hellish regime of Pol Pot" which during its three years in power has turned that country into "a living hell."

The session continued late into the night with the Soviet Union supporting the Vietnamese interpretation while the Chinese claimed that the Russians were the instigators of the Cambodia-Vietnam conflict because they were trying to extend their influence throughout Southeast Asia.

In pleading his case, Sihanouk potrayed Cambodia as the victim of "Vietnamese aggression and colonization." But he suggested that forces loyal to Pol Pot would continue their struggle against the new government.

"Our government and our people are fighting and will fight to death," he said. "We may lose everything but we will never lose our national honor."

Sihanouk was released from house arrest only a week ago when the Pol Pot government, besieged by the Vietnam-supported insurgets, sought to utilize Sihanouk's international reputation and have him argue its case at the U.N.

The Cuban delegate drew the attention to this fact. Describing him as an "opera prince," the Cuban questioned Sihanouk's failure to condemn the arbitrary policies of Pol Pot and the deaths of tens of thousands of Cambodians.

Earlier today, the Soviet Union tried to postpone the emergency meeting until Monday so that Hun Sen, foreign minister in the new Cambodian government could arrive in New York to give his side of the two-week war.

Meanwhile, the new government in Phnom Penh mounted a propaganda offensive accusing the Pot Pol regime of "ferocious genocide" during their three years in power.

Agence France-Presse in a report from Hanoi quoted a member of the new Cambodian leadership as saying "Nearly 3 1/2 million citizens were driven out into the fields and shut in Chinese-style communes, veritable concentration camps where they died from hunger, thirst, sickness and brutality."

The agency quoted the Cambodian official as sayng that "nearly three million Cambodians" perished during the past three years.

An offical statement issued by the new Phnom Penh government and monitored here said that the Pot Pol government had transformed Cambodia "into a hell on earth covered with blood and tears."

The new government, the statement said, is committed to building a "peaceful, independent, democratic, neutral and nonaligned Kampuchea advancing to socialism."