Injection molding machine capable of conveniently replacing mold

The invention relates to an injection molding machine capable of conveniently replacing a mold, and relates to the technical field of injection molding. The injection molding machine comprises a workbench and a support fixedly arranged on the workbench, the support is provided with a pressing plate and a lifting mechanism, the lifting mechanism is connected with the pressing plate, and the lifting mechanism is used for driving the pressing plate to move in the vertical direction. An upper mold is installed on the lower surface of the pressing plate, and a lower mold is installed on the upper surface of the workbench. A mounting groove for inserting the upper mold is formed in the end wall of the pressing plate in the width direction of the pressing plate, a plurality of sliding grooves are symmetrically formed in the inner side wall of the mounting groove, locking rods are arranged in the sliding grooves in a sliding mode, a locking groove for inserting a locking rod and abutting against the locking rod is fo