Abstract: Aiming at the middle section of the axle housing, the outer circle, inner hole and end face of both ends are machined on the horizontal double-sided numerical control boring machine. According to the technological requirements of the end face and the structural characteristics of the axle housing, a fixture which can adapt to multiple varieties and is convenient to install without replacing any parts is designed and manufactured. It realizes the rapid switching from single variety to multiple varieties of the special plane, lays a foundation for the intelligent production of the special plane, and at the same time ensures the high-efficiency and high-precision processing characteristics of the special plane. The hydraulic self-centering fixture at both ends of the axle housing is used for centering, the middle floating plane is fixed in the angle direction, and the middle expanding pipa hole is fixed in the axial direction, which effectively ensures the reliability of fixture positioning, the convenience of installing workpieces and the safety of clamping. It is proved that the design of the fixture is reasonable and the application effect reaches the expectation.