Automatic fused biconical taper device for polarization-maintaining optical fiber coupler

The utility model relates to the technical field of fused biconical taper of optical fiber couplers, in particular to an automatic fused biconical taper device of a polarization-maintaining optical fiber coupler, which comprises a control panel, a workbench, an input end coupler and a pair of output end couplers. A mounting plate is arranged on the first sliding groove in a sliding mode, a plurality of fixing mechanisms used for fixing the input end coupler and the pair of output end couplers are arranged on the mounting plate, and a plurality of optical fibers to be processed are arranged between the input end coupler and the pair of output end couplers. Through cooperation of the first motor, the first positive and negative screw rod, the moving block and the mounting plate, a fused optical fiber is stretched, and at the moment, the output end of the second motor drives the second positive and negative screw rod to rotate, so that a pair of sliding blocks on the second positive and negative screw rod respec