The invention belongs to the field of aerostat testing, and in particular relates to a strength testing device for a connector of an aerostat. There is currently no special test device specifically designed for the strength test of a typical connector for aerostats. The object of the invention is to change the disadvantages such as large field occupying, low installation efficiency, long test period, and poor repeatability in the existing test methods. A fixing module tightens and fixes the edge of a base fabric on a fixing gantry; horizontal loading pulleys are further disposed at different positions of the edge of the fixing gantry; a loading module fixes pulley rails above the fixing gantry through a loading gantry, and movable vertical loading pulleys are mounted on the pulley rails; the loading module further has an operating cylinder, one end of the cable is connected to the operating cylinder, and the other end is connected to the connecting cloth via the loading pulleys, thereby realizing the automation of test installation and loading, and greatly improving the test efficiency. The test device is automatically controlled by programs from installation to loading, which greatly improves the test efficiency.