Compressor supporting device capable of automatically tensioning belt

The utility model discloses a compressor supporting device capable of automatically tensioning a belt. The compressor supporting device comprises a support base, a compressor support and a double-spring structure. A compressor support and a support base which do not interfere with a belt are arranged on the side, close to the compressor, between the compressor and the driving wheel in a left-right spaced mode, the compressor is fixedly arranged on the left side face of the compressor support through a fixing bolt, and the lower end of the compressor support is vertically hinged to the lower end of the support base in the left-right direction. Arc kidney-shaped holes are formed in the front side and the rear side of the upper end of the support base in the left-right direction, and a double-spring structure is arranged between the upper end of the compressor support and the upper end of the support base in the left-right direction. The upper end of the compressor support can move along the circular-arc-shaped