Miniaturized polarization-maintaining optical switch

The utility model provides a miniaturized polarization-maintaining optical switch, which relates to the technical field of polarization switches, and comprises a mounting seat, a plurality of mounting grooves are formed in the top of the mounting seat, first shaping plates are fixedly connected to the top of the mounting seat close to the edges of the two sides, and a switch main body is slidably connected between the inner walls of the plurality of mounting grooves. Positioning plates are fixedly connected to the outer surfaces of the two sides of the switch main body, and the outer surfaces of the two positioning plates are in sliding connection with one sides of the two first shaping plates. In the use process, the positioning plate is fixed through the second template, the second template is fixed through the sliding rod, therefore, bolts are not adopted for fixing, the problem that in the prior art, bolts are prone to being oxidized and consequently are not prone to being dismantled is solved, the first