Rotational flow cut-off device for rainwater well

The invention provides a rotational flow cut-off device for a rainwater well, and relates to the technical field of cut-off equipment for rainwater wells. The rotational flow cut-off device comprisesa water storage barrel body, a water injecting pipe, a filtering barrel body, a water outlet pipe, a waste material hopper, a filter net, a waste material net, a water injection turbine wheel, a waterinjection gear, a water outlet turbine wheel, a water outlet gear and a gear transmission chain. A water injection opening is formed in the water storage barrel body, the water injecting pipe is connected with the water injection opening in the tangential direction of the water storage barrel body, a water outlet is formed in the filtering barrel body, filtering holes are formed in the filter netand comprise oval holes and conical baffles, a shaft rod of the water injection turbine wheel is connected with the water injection gear, a shaft rod of the water outlet turbine wheel is connected with the water outlet gear, a