Poland's communist authorities today joined with the independent trade union federation Solidarity in formally denying a Soviet report alleging "counterrevolutionary" disorders in the southern town of Kielce.

The allegation by Tass, the official Soviet news agency, is regarded here as the opening shot in a new propaganda campaign against Solidarity. It was denied by the union and a local branch described it as "a complete lie and falsification aimed at misleading Polish, Russian, and world opinion."

A spokesman for the government information agency Interpress also denied the report after checking with local officials.

Western analysts here believe that such allegations represent part of growing pressure tactics by the Kremlin and its East European allies against the Polish authorities and the new independent unions.

The move follows last week's Warsaw Pact summit meeting in Moscow, which appeared to give Poland some breathing space to sort out its problems but also clearly defined the vital stake of all Soviet Bloc countries in the outcome of the Polish crisis.

It is now clear there are two very different interpretations of the results of the summit. In an editorial today, the Czechoslovak Communist Party newspaper Rude Pravo stressed the dimension of "internationalist solidarity" in its insistence that "Polish Communists are not alone and can count on an infusion of aid from the socialist community."

Polish papers, however, stressed the portion of the communique that recognized the ability of the Polish people to solve their own problems. This interpretation was strongly underlined in an article in the Warsaw daily, Zycie Warszawy, that said all Warsaw Pact countries had a right to look for solutions to their own problems, taking into account their own national characteristics, within the framework of socialism.

The paper added: "This is accompanied by the right to decide one's own destiny according to the principles of independence and sovereignty, without the use of force or even the threat to use it in relations among states."

Describing the Warsaw Pact communique as "a calm, constructive document," the paper said it was worth noting that it appeared at a time when the Western world was flooded with disturbing speculation about instability in Poland and Europe.

There has been no official reaction here to last night's statement from the White House claiming that the Soviet Union is ready to launch an invasion of Poland. But at the Helsinki review conference in Madrid, Polish Deputy Foreign Minister Marijan Dobrosielski said unfounded talk about an invasion tended only to create an atmosphere of tension "that makes it harder to solve Poland's problems."

Combined with the campaign in the Soviet news media, the repeated warnings of possible Soviet intervention from the West are having a clear effect on Poland's domestic politics. While few ordinary people here believe an invasion to be imminent, Solidarity's leaders are doing their utmost to avoid all conflicts with the authorities.

In addition to the Tass allegation, a separate report on Radio Moscow accused Solidarity's leader, Lech Walesa, of boasting about a gift of $10 million that he allegedly received from West Germany. The radio accused "antisocialist elements" of seeking to exploit the crisis in Poland for their own ends.

The Polish Army newspaper, Zolnierz Wolnosci, today published an editorial supporting reforms in Poland, which it said were necessary for the proper functioning of the defense forces. The paper said the Army wanted a political resolution of the crisis, which it said was weakening the country's defense capability.

But it also warned against "social unrest" and said attempts were being made "to paralyze authority" and create chaos and anarchy. "We are convinced that the frontier that we must not cross has been reached," the paper said.