The invention discloses automobile part machining polishing equipment convenient to adjust, which comprises a suction pump, a supporting base, a left-right driving piece, a piece capable of moving back and forth, a rotatable workpiece support, a seat capable of being adjusted up and down, a polishing piece, a workpiece auxiliary supporting piece, a support capable of sliding left and right and a workpiece angle adjusting tool, the polishing equipment comprises a cross-shaped bottom plate, four supporting legs are evenly arranged on the lower surface of the cross-shaped bottom plate, a U-shaped frame is arranged on the upper surface of the cross-shaped bottom plate, a support capable of sliding left and right is arranged on the upper surface of the cross-shaped bottom plate, and the support capable of sliding left and right comprises two second sliding rails arranged on the upper surface of the cross-shaped bottom plate. The automobile part machining device is simple in structure and easy and convenient to operate, automobile parts of arc-shaped structures can be automatically adjusted and machined, automobile parts of L-shaped structures can be automatically machined, the application range is wider, adjustment is more comprehensive, and convenience is provided for people.