The invention relates to a pneumatic high-speed throwing device, belonging to the field of aircrafts, in particular to the pneumatic high-speed throwing device which is placed in a narrow space. The device has the functions of clamping and high-peed throwing, and comprises a throwing device and a clamping device, wherein the throwing device consists of an air cylinder with double piston rods and four air ports, an upper piston rod and a lower piston rod. The clamping device comprises two synchronous shafts, two rolling sleeves, two bending plates, two middle rotating shafts, two lower rotating shafts, two V-typed clamps and two tensioning springs. The device can be used in a narrow installation space and a short stroke space to realize large throwing force, a high speed and an angle, the separation and throwing are carried out simultaneously, and respective control on separation and throwing is not needed to be considered. According to the device, a throwing device is integrated, the device can be installed according to a required angle, the installation is convenient, the size is small, and the clamping of throwing materials are extremely convenient.