The invention discloses a comprehensive fixture capable of increasing the manufacturing accuracy of a brake caliper. The comprehensive fixture is characterized by comprising a base, support lug hole positioning seats, a pressing rod, a single-arm rotary auxiliary pressing cylinder and a support hydraulic cylinder; and the support lug hole positioning seats are arranged on the base symmetrically from left to right, a first positioning column and a second positioning column with a small diameter are arranged, a positioning surface is formed on the first positioning column, and the second positioning column is located on the positioning surface of the first positioning column. The comprehensive fixture has the beneficial effects that the product processing precision is further increased by using the fixture, especially, the parallelism of the support lug end surface hole of the brake caliper and the end surface of a hooked claw and the perpendicularity of the cylinder hole and the end surface of the hooked claw are effectively controlled, the after-sales failure rate is obviously reduced by applying the tool, the after-sales cost of the product is further reduced, the effect is obvious, and the safety and stability of automobile brake are basically increased.