Combined rotary vane of mechanical vacuum pump

The invention provides a combined rotary vane of a mechanical vacuum pump. The combined rotary vane comprises a rotary vane body and a blade; the left end and the right end of the rotary vane body continue to extend leftwards and rightwards to form protruding parts; the thickness of the protruding parts is smaller than that of the rotary vane body; the two side faces and the top face of each protruding part are each provided with an axial groove; and the outer circumferential face of each protruding part and the three grooves are wrapped and filled with PEEK materials in an injection molding manner, and therefore the blade is formed. Due to the fact that the structure, used for connecting the blade, of the left end and the right end of the rotary vane body is changed into outward protruding from traditional inward concave, the three grooves are formed in each protruding part, then the PEEK materials are used for conducting injection molding wrapping on the protruding parts at the two ends of the rotary vane b