Novel pneumatic actuator

The utility model relates to the technical improvement of a pneumatic actuator, in particular to a novel pneumatic actuator, which can be suitable for introducing gas at higher pressure to finish a rapid execution effect and ensure the structural stability of the actuator. Comprising a fan-shaped shell, a transmission shaft and an air wall plate, a fan-shaped cavity is formed in the fan-shaped shell, the transmission shaft is installed at the circle center of the fan-shaped cavity, the air wall plate is installed on the transmission shaft, and the size of the cross section of the air wall plate is the same as that of the cross section of the fan-shaped cavity. The reinforcing structure comprises at least three radial main reinforcing ribs I which are outwards diffused from the circle center of the fan-shaped shell, an arc-shaped main reinforcing rib II which is concentric with the fan-shaped shell, and an auxiliary reinforcing rib which is positioned at the arc-shaped edge of the fan-shaped shell and faces th