The invention provides a gate valve, a gate valve system, a rotating device and fluid machinery applying the gate valve, the gate valve system and the rotating device. The gate valve comprises a gatevalve body. The gate valve comprises a gate valve body, wherein the side surface and/or the bottom surface of the gate valve body is provided with a diversion structure. According to the gate valve, the gate valve system, the rotating device and the fluid machinery, a fluid flowing through the interior of the diversion structure wash the bottom surface and/or the of side surface the gate valve, sothat a viscous medium is prevented from being adhered to the gate valve.