Fixing device for spring stretching detection

The utility model discloses a fixing device for spring stretching detection, which comprises a reference fixing frame, four long strip racks are arranged in the fixing frame and distributed at four corners of a square, an adjusting mechanism acting on the four long strip racks is arranged on the fixing frame, and the adjusting mechanism is connected with the four long strip racks. A fixing plate is fixedly connected to the outer wall of one long-strip-shaped frame, a guide groove is formed in the fixing plate, and a limiting plate is inserted into the guide groove in a sliding mode. The four long-strip-shaped frames are controlled to move through the adjusting mechanism, so that the size of the mounting groove is changed, and spring bodies with different outer diameters are conveniently limited; after the size of the mounting groove is adjusted, the spring body is placed in the mounting groove, the tail of the spring body is located below the fixing plate, then the limiting plate is inserted downwards, the li