The invention provides a machining process of a push plate fixing plate. The machining process comprises the following steps that a, material preparation is made, wherein the size of the push plate fixing plate is calculated, and corresponding materials are selected for material preparation; b, grinding machine finish machining is carried out, wherein a six-face grinding angle ruler is used for meeting the size requirement; c, milling machine hole punching is carried out, wherein the push plate fixing plate is clamped to a milling machine, and the milling machine is used for hole punching; d,drilling machine machining is carried out, wherein a drilling machine is used for machining a push rod hole, a reset rod hole and a thread bottom hole; e, benchwork and tapping are carried out; and f,fine trimming is carried out, wherein a push rod and a reset rod are used in a matched manner to achieve fine trimming on the push rod hole and the reset rod hole. The machining process of the push plate fixing plate is convenient and quick in machining; and the milling machine is used for conducting hole punching in advance, and accuracy of the push rod hole and the reset rod hole can be greatlyimproved.