Mold fixing device for tire mold polishing

The utility model discloses a mould fixing device for tire mould polishing, which comprises a fixing device main body and a tire mould, the tire mould is placed on the surface of the fixing device main body, and the fixing device main body is connected with the tire mould through a rotating assembly. The rotating assembly comprises first threaded rods rotating in internal threads on the two sides of the fixing device body, a rotating disc is arranged on the surface of the outer end of each first threaded rod, a clamping piece is rotationally arranged in the inner end of each rotating disc, multiple sets of spring grooves are formed in the clamping pieces located in the first threaded rods, and springs are arranged on the inner walls of the spring grooves. And a positioning block slides in the spring groove. Through the arrangement of the first threaded rod, the rotating disc, the clamping piece, the spring groove, the spring, a positioning block, an auxiliary groove, a fixing block and a clamping groove, a wo