The invention relates to a cement prefabricated part direct-extrusion vibration method integral forming mold and a machining method thereof. The mold comprises an inner mold body and an outer mold body. A cavity used for pouring is formed between the inner mold body and the outer mold body. An opening and closing mechanism for pushing the inner mold body to expand outwards and extrude downwards is located in the inner mold body. The inner mold body comprises an inner bottom mold located at the bottom and an inner barrel mold forming a side wall in a defining manner. The inner barrel mold is defined by steel plates. Two connectors at steel plate seams are overlapped and in lap joint together and can slide relatively. The bottom of the inner barrel mold is movably connected with the inner bottom mold. A feeding device and a vibration deice located at the bottom of the inner mold body and the bottom of the outer mold body are further included. According to the cement prefabricated part direct-extrusion vibration method integral forming mold and the machining method thereof, air and redundant water in products are exhausted through extrusion vibration, the strength and density of product concrete are improved, a supernormal dense effect is obtained, and product anti-permeability and structural performance rigidity are improved. Due to the fact that absolute stability of not allowing concrete to have moving space exists in extrusion force, cracks generated by uneven settling do not exist.