The Kremlin continued firming up its public stance on the Polish issue today, with Pravda implying that there would be Warsaw Pact action should Poland's communist leadership splinter from internal political pressures.

The authorative Communist Party newspaper never mentioned Poland but argued that all communist nations are duty-bound to collectively protect individual communist states from attack by bourgeois imperialists.

Pravda's restatement of the "Brezhnev Doctrine" first formulated to explain the 1968 Warsaw Pact invasion of Czechoslovakia comes as Soviet preparations for quick military intervention are reported by Western capitals to be complete and Western concerns remain high over Moscow's long-range intentions.

The article, which Pravda said was a review of the lessons of the Czechoslovak crisis 12 years ago, is seen here as part of the steady accretion by Moscow of justification for intervening if it ever decides the power of the new independent trade unions in its key satellite has moved beyond control of Poland's Communist Party.

Meanwhile, Soviet propaganda continued sharp attacks on Washington, with Moscow Radio's English-language world service declaring that the United States "is fanning up a war psychosis" over Poland. It said this is proved by the decision this week to dispatch four electronic intelligence aircraft to Western Europe, U.S. labor union donations to support "forces in Poland hostile to socialism," and increased "subversive broadcasts" by Radio Free Europe.

Pravda asserted that the party, "avant-garde of the working class," must retain the leading place in a communist society as one of the "permanent and unshakeable principles of socialism." It reiterated that Poland must stay aligned with Moscow internationally, calling essential to communist life "the principles of proletarian internationalism and their constant embodiment in foreign policy, especially in relation to the Soviet Union."

The article said the Czechoslovak crisis occurred in part because "revisionist and nationalist forces" among Prague's communist leaders had become "a Trojan horse for imperialist reaction." Earlier this week, the official Tass press agency accused the Solidarity independent union movement in Poland of turning to "open confrontation" with the Warsaw leadership of Stanislaw Kania to drive Poland into the Western camp.

Pravda modified this theme today, but made clear the Kremlin remains angered over the sudden rise of the workers movement, complaining that "the modern counterrevolution" is seeking to shake free from Soviet domination by advancing ideas "on improving socialism, giving it a 'real' national character opposed to the Soviet model."