Abstract: The method for producing powder from polymeric material includes its heating and subsequent grinding by action of pressure and shearing at values from 0.5 to 50 at simultaneous cooling. The distinction of the method is that heating is carried out up to 30-250° C. in two stages: firstly, at a pressure increasing from 0.1-0.5 MPa to 3-100 MPa and, secondly, under isobaric conditions at shearing 0.3-10 during 0.3-5 sec, and said grinding is performed as the pressure is decreased down to 0.1-0.5 MPa. The device for producing powder from polymeric material comprises a grinding chamber having a casing (2) and a grinding rotor (3) in a shape of a body of revolution with an annular clearance (4) towards the inner surface of the casing.