The party was active in trade union struggles, mainly mobilizing miners and workers in heavy industries.
Other prominent members of the party were Antoni Steffek and Wiktor Sembol.
[1] Before the 1935 elections, there was an internal debate between those who favoured a renewal of the Polish bloc electoral tactic of 1925 and 1929 and those who wanted a common list with Czechoslovak Social Democrats.
The alliance with the Czechoslovak Social Democrats did not succeed to send a member of the Polish party to the Parliament.
It was represented by Chobot in the Executive of the International 1931–1938, he shared his seat with Johann Kowoll of DSAP.