The invention provides a swirling sand removing device and a swirling sand removing method. A hollow center
pipe is arranged in a connecting
pipe in a sliding manner, the front end of the connecting
pipe is connected with a rotary front
nozzle component, and a rear
nozzle component is arranged at the side wall of the connecting pipe; a side through hole is formed in the side wall of the center pipe, and the side through hole is communicated with a rear
nozzle of the rear nozzle component when the center pipe is located at an axial position; a
piston component is arranged in the connecting pipe, a
piston through hole is formed in the
piston component, and the piston through hole is communicated with a front nozzle of the front nozzle component; when the central pipe moves axially, the piston is closed or started by the central pipe; a spring which enables the center pipe to be far away from the front nozzle component is further arranged between the central pipe and the connecting pipe. By adopting the structure and the method provided by the invention, the axial movement of the central pipe can be controlled by feeding
fluid supply pressure of the connecting pipe, and the forwards rotary
liquid injection of the front nozzle component and the backwards
liquid injection of the rear nozzle component can be realized, therefore the sand can flow orderly in a shaft bottom, the turbulence is low in the sand removing process, and the sand cleaning effect of the shaft bottom can be improved.