The invention relates to a novel combined type fixed extrusion pad which comprises an ejecting block (1) and an extrusion pad body (2), wherein, a truncated conical hole (2.1) and a step hole (2.2) are axially arranged in the middle of the extrusion pad body (2) and a looseness proof pin hole I (2.1.1) is arranged on a step surface of the bottom of the truncated conical hole; an anti-rotary key way I (2.3) is axially arranged at the outer margin of the back end of the extrusion pad body (2); the ejecting block (1) comprises a truncated cone body (1.1) and a handle part (1.2), a looseness proof pin hole II (1.1.1) is arranged on a back end surface of the truncated cone body (1.1), and the part of the truncated cone body of the ejecting block is embedded into the truncated conical hole (2.1) of the extrusion pad body; a looseness proof pin I (5) is inserted into the looseness proof pin hole II and the looseness proof pin hole I; the handle part (1.2) of the ejecting block (1) is inserted into the step hole (2.2) of the extrusion pad body (2), a locknut (3) is screwed on the back end of the handle part (1.2), and a looseness proof pin II (6) is inserted into a joint position of the locknut (3) and the handle part (1.2). The ejecting block and the extrusion pad body are matched without looseness or frequent disassembly and replacement, and the gap between the ejecting block and the extrusion pad body can be controlled.