Metal oxide semiconductor (MOS) tube surface mounting welding jig

An MOS transistor surface mounting welding jig comprises a positioning plate, a limiting plate and a pressing floating assembly, containing grooves are distributed in the positioning plate, receding holes are formed in the middles of the bottom faces of the containing grooves, the limiting plate is arranged on the positioning plate in an attached and positioned mode, and limiting through holes are formed in the positions, corresponding to the containing grooves, of the limiting plate; the pressing floating assembly comprises a base plate, ejector rods are arranged at the positions, corresponding to the limiting plate and the closed structure, of the base plate in a penetrating mode, the inner ends of the ejector rods are located between the base plate and the limiting plate and movably sleeved with compression springs, one ends of the compression springs are fixedly connected to the ejector rods, and the other ends of the compression springs are fixed to the base plate. The base plate is detachably and fixedl