Optical fiber heat shrink tube shrinking machine

The utility model belongs to the technical field of optical fiber equipment production, and particularly relates to an optical fiber heat shrink tube shrinking machine which comprises a workbench. The side wall of the workbench is fixedly connected with a supporting frame. A first sliding groove is formed in the middle of the supporting frame. A servo motor is installed on the side wall of the supporting frame. According to the step, a first sliding groove, a servo motor, a threaded rod, a sliding block and a fixing ring are arranged, an air heater and a shunting block which are fixed in the middle of the fixing ring can be driven to transversely move along the first sliding groove, and then a heat shrink tube arranged on a fixing assembly is heated, so that the heat shrink tube wraps and seals an optical fiber; the situation that the moving speed is inconsistent in the process that a worker holds an air heater to conduct reciprocating air blowing heating on the heat shrink tube is reduced, and the situation