Forced circulating pump

The utility model relates to a forced circulating pump which comprises an impeller nut, an impeller, a pump body, an anti-vortex guide vane device, a liner bushing, a pump cover and a mechanical seal, wherein the anti-vortex guide vane device comprising a guide vane sleeve and a plurality of guide vanes is arranged on the pump cover in the pump body, the guide vanes are arranged on the guide vane sleeve, the guide vane sleeve has a hollow structure and sheathed on the outer layer of the liner bushing of the pump, and one end of the guide vane sleeve is connected with the pump cover, thereby effectively solving the anti-cavitation performance of the pump. The forced circulating pump has simple structure, convenience in mounting and low cost.