The Union today denounced the U.N. General Assembly resolution calling for prompt withdrawal of foreign troops from Afghanistan as "intervention in the internal affairs" of Russia's newest satellite.

Making clear the Kremlin has not intention of paying any attention to its crushing, 104-18 defeat yesterday, the Tass official press agency declared that "not all delegations could grasp the essence" of Afghan developments. "As a result, the resolution's sponsors succeeded in dragging throught a resolution designed to undermine the security of the Afghan state."

Neither Tass nor Radio Moscow in brief dispatches concerning the vote mentioned the tally or that such Soviet allies as Iraq had approved the resolution and others, such as Syria, had abstained. Radio Moscow said the outcome was the result of "backstage machinations by the U.S." to continue its campaign to undermine the April 1978 coup that brought a Marxist regime to power in Kabul.

The tenor of the accounts is consistent with the way the Russians so far have explained their Dec. 27 military intervention, that is, as a response to an appeal by a legitimate government for help in fending off internal subversion backed by the United States and China.

From Soviet leader Leonid Breznev to the most humble propagandist, the Russians have concentrated their attacks on Washington and virtually ignored the condemnation heaped in them from elsewhere in the world. The Kremlin stategy for deflecting criticism from Islamic and Thrid World governments is to repeat its positions that the Carter administration and the Chinese leadership sought to build an "imperialist stronghold" in Afghanistan.

The Communist Party newspaper Pravda continued the theme in a commentary today on the recent visit to Peking by U.S. Defense Secretary Harold Brown. "The U.S. military are maiking plans for the broadest possible participation of China in Washington's aggressive policy aimed against neighbors of China, and above all against the Soviet Union," the paper asserted.

It called the visit a sign of a "sinister alliance," and asserted that "Chinese generals are negotiating with Pakistan increased Chinese military assistance in connection with the events in Afghanistan." This shows the "parallel strategic interests of Peking hegemonism and U.S. imperialism," Pravda said.

The Soviet media has run a virtually non-stop campaign of anti-American propanda since President Carter's invasion reprisals were announced last week. The media has also played on historic fears of the Russian people about the "Chinese menace," which cuts more deeply here than diatribes against the more distant Americans.

In other U.N. reactions, Tass accused the White House of making a "high-handed statement" which attempts to distort the "meaning" of the Soviet veto of a Security Council resolution imposing economic sanctions against Iran. Tass described the blocking of the resolution a "failure" by the United States to "impose" its will on the U.N., without ever saying the Soviets had vetoed it.

As to the 50 U.S. hostages being held in Tehran, Tass said, "the Soviet position is well known." The Soviet Union supports diplomatic immunity "but it is also necessary to respect in equal measure the sovereignty of states.

"If they think in Washington that the policy of blackmail and threats of a naval blockade against revolutionary Iran, a policy fraught with a danger to international peace and security, will help somehow secure the release of the hostages, this is evidently a dangerous delusion."