The utility model relates to a canned type pneumatic gate valve for buggy. The disk seat has the cavity, and the valve body is fixed to the left end of disk seat, right -hand member fixed seal seat, the right -hand member of the valve plate of application valve body switch and the left end of valve rod are articulated, and it is articulated that the right -hand member of valve rod passes through the middle part of cavity and seal receptacle and the connecting rod of disk seat, the both ends of connecting rod respectively around with cylinder, the piston articulated, the front and back cylinder, fix respectively on the antetheca of disk seat, seal up fixed upper and lower sealed apron on the upper and lower terminal surface of disk seat respectively, it is sealed with the cavity of disk seat. Its simple structure, the leakproofness is good, uses safe and reliable.