A senior Polish politician today issued what could be interpreted as a veiled warning against Soviet military intervention in Poland.

Stanislaw Gucwa, who heads the Peasant Party, a socialist faction that belongs to the ruling Communist-dominated coalition, also attacked publication abroad of false information about Poland's unrest. He did not specify to whom he was referring but his remarks appeared aimed at the Soviet Union as much as the West.

Addressing the Peasant Party congress, Gucwa said: "We consider as inadmissible any external intervention or interference in the internal affairs of Poland. We also consider inadmissible any attempts to distort the situation in Poland in order to exploit our difficulties for political purposes."

It was believed to be the first time a senior Polish official stated publicly that foreign intervention in Poland could not be justified. The official position has been that Poland is capable of solving its problems but the Communist Party reserves the right to request military aid from its allies in the event of "counterrevolution."

Gucwa's speech appeared to rule out any intervention, even Soviet, although it could be that the difference is one of semantics: if "requested," Soviet intervention would be considered "fraternal assistance."

The Peasant Party congress was addressed also by Poland's Communist Party chief, Stanislaw Kania, who praised Soviet President Leonid Brezhnev as "a great friend of Poland."

Polish authorities today suspended an expulsion order served yesterday on an American journalist, Stephen Miller, of the Associated Press. He will now be allowed to remain in Poland until after ceremonies next week marking the 10th anniversary of the bloody suppression of workers' riots along the Baltic Coast.

[In Moscow, AP reported, the official Tass news agency branded as "blackmail" Friday's NATO communique denouncing the Soviet troop buildup on the Polish border. Saying alliance countries previously had been involved in Poland, Tass accused them of "making a bid for a further sharpening of the situation."]