Auxiliary fixing device for plastic bottle opening cutting

The utility model discloses an auxiliary fixing device for cutting a plastic bottle opening. The auxiliary fixing device comprises a fixing base, an auxiliary fixing cover and a bottle opening fixing column. The bottom of the auxiliary fixing cover can be fixed to the upper surface of the fixing base, the bottle opening fixing column is vertically arranged at the top of the auxiliary fixing cover, the upper surface of the bottle opening fixing column is partially downwards sunken and provided with a bottle opening channel communicating with the interior of the auxiliary fixing cover in a penetrating mode, and a supporting gasket is detachably arranged in the bottle opening channel. A supporting gasket is arranged on the inner side of the top of the auxiliary fixing cover. The device solves the problems that in the prior art, a clamping device is generally used for acting on a bottle body of a plastic bottle, the bottle body is prone to extrusion deformation in the cutting process due to the fact that the stre