Automatic reset support

The utility model relates to an automatic reset support which comprises a sleeve, a C-shaped supporting body, a limit insertion pin, an R-shaped pin and a spring. The sleeve is fixed to one side, close to a C-shaped opening, of the C-shaped supporting body. The spring is placed in the sleeve, the top and the bottom of the limit insertion pin respectively penetrate through the sleeve, the middle of the limit insertion pin is installed in the spring inside the sleeve, and the top of the limit insertion pin is connected with an inclined handrail. A round hole is formed in the bottom of the limit insertion pin, and the R-shaped pin penetrates through the round hole in the bottom of the limit insertion pin for limiting the limit insertion pin. The automatic reset support has the advantages that after the handrail is pressed downwards through gravity, the limit insertion pin can automatically reset, meanwhile, when the C-shaped supporting body is opened manually, people only need to press the handrail downwards for limiting in a one-button mode, under the action of a pipeline, the limit pin automatically resets again, and therefore the whole limiting process is simple and convenient to operate.