The invention relates to the technical field of extrusion injection molding machines, to solve the problem of low production efficiency of an injection molding machine in the prior art. In particular, the invention relates to an extrusion feeding mechanism, comprising a pushing assembly, a sliding assembly and an extrusion assembly, wherein the pushing assembly drives the extrusion assembly for straight reciprocating motions through the sliding assembly; the pushing assembly comprises a first support frame, a first oil cylinder mounted on the first support frame, and a connecting plate capable of doing straight reciprocating motions under the push of the first oil cylinder; a channel for the first support frame to pass is arranged on the connecting plate; the sliding assembly comprises a substrate and a sliding member; the first support frame passes through the connecting plate to be fixedly connected to the substrate. The invention also specifically relates to an extrusion injection molding machine, comprising the extrusion feeding mechanism, wherein two extrusion feeding mechanisms are arranged, each of which is disposed on each of two sides of an injection mold, and respectively correspond to a first injection molding port and a second injection molding port. The production efficiency of the current injection molding machine can be accelerated, and production costs can be saved.