Air brake isolation handle on metro folding vehicle

An air brake isolation handle on a subway folding vehicle relates to the field of vehicle brake systems and solves the problems that an existing handle is of an unfoldable straight structure and can only rotate on the horizontal plane, when the handle is in an isolation state, the tail portion of the handle protrudes out of the vertical plane with a built-in side wall plate, and the side wall plate needs to be designed to contain the handle. The device comprises a fixed seat, and the fixed seat is fixedly connected with a brake isolation valve; the handle is rotationally connected with the fixed seat through a pin shaft; wherein a spring mechanism is further arranged in the handle, and the spring mechanism in the handle is used for keeping the handle and the fixing seat in an attached state all the time. According to the handle, the degree of freedom of rotation motion of an original handle in the horizontal direction is not changed, meanwhile, the degree of freedom of motion of the handle in the vertical pla