The independent trade union Solidarity today issued two new warnings against the state that appeared to keep Poland on an internal collision course.

In a unanimous resolution by its 107-member national commission, Solidarity termed unacceptable certain parts of a proposed bill intended to govern the existence of independent trade unions. The legislation is to come before parliament next week.

The promise of such a bill was a cornerstone achievement of workers during Poland's social upheaval in the summer of 1980. A joint union-government group worked out a compromise formula for the law but authorities later made amendments.

Among the changes, according to Solidarity officials, was a provision for an unconditional three-month ban on strikes. "Solidarity will not accept any provisions that may paralyze the activities of the union," today's resolution declared.

On another point, Solidarity's national commission backed a threat by its broadcast branch to close the country's radio and television networks if a plan is approved to reorganize the broadcast stations in a way that would allow authorities to weed out Solidarity members.

In the face of the strike threat, a government council reportedly postponed an expected Saturday meeting to consider the reorganization plan.

But the trade union bill remains an urgent and potentially explosive issue. In recent days, government sources have been hinting that passage of the bill in its present form might preclude the need for an emergency powers act also being sought by Communist Party officials.

The party has asked for special measures to curb civil liberties, including the right to strike, in order to stabilize Poland through the winter. Solidarity's leadership is threatening a general strike if such measures are passed and enforced and Poland's powerful Catholic Church also opposes an extraordinary powers bill that it contends could tear the country apart.

The agenda for parliament next week, when first published several days ago, did not include the emergency powers bill. But the Polish press agency PAP reported cryptically today that another unspecified item had been added to the agenda for Tuesday's session. A government spokesman would not say whether the new item was the emergency powers act.

Just what tactics to pursue in view of the renewal of tensions with the state is a central question confronting Solidarity's governing council at the meeting that began today and is expected to last through Saturday.

Union and government representatives have broken off talks on a range of concerns and each side has been accusing the other of seeking confrontation.

Statements by union leaders today ranged from calls for militant confrontation to pleas for proceeding with caution although the general mood seemed one of anger and pessimism.

Leaders of two of Solidarity's most militant branches, in Warsaw and Bydgoszcz, repeated calls for the creation of a social council on the national economy that would consist of "nonideological people" and serve in effect as a provisional national government until democratic elections could be held.

Since this idea was first mentioned last week at a meeting of Solidarity's regional chiefs, authorities have accused the union of being bent on a takeover of power.

Solidarity officials, in turn, have charged the state with bargaining in bad faith and taking repressive actions against union members.

"The struggle has only begun," Solidarity leader Lech Walesa said today in a statement to the commission. "The policy of small steps has produced no results." At the same time, he appeared to be trying to steer between threats against the government and the chance of conciliation.

"One cannot go for a showdown today, but Solidarity is not stepping back," Walesa said. He added that the union's broad demands on greater access to the news media, political election reform and economic reform would have to be better defined before the union approached the authorities again.