The invention discloses a milling
modular fixture, which comprises a centre connecting plate, a four-axis connecting plate and a positioning plate. A center shaft of the centre connecting plate is contacted with a centre on a
tailstock; a center shaft of the four-axis connecting plate is connected with a four-axis rotary table of a
machine tool; and the positioning plate is provided with a positioning hole and an elastic deformation hole. The milling
modular fixture has the advantages that: the milling
modular fixture has reasonable design, simple structure, low manufacturing cost, simple and convenient operation, difficult mixed
assembly during installation and the like, improves the
machining precision of shaft parts, solves the problems of unwarrantable precision of the conventional shaft parts machined for multiple times, high manufacturing cost, inconvenient operation and the like in the multi-time
machining process, solves the problem that holes in an axial direction and a radial direction of the shaft parts are not machined simultaneously, improves the
machining efficiency, namely multiple parts can be machined once, avoids the phenomenon of machining omission of the holes in the
machining process, and has a function of error protection.