Underground sand sweeping tool

The invention provides an underground sand sweeping tool which comprises a sleeve assembly and a sand sweeping assembly, the sleeve assembly comprises a positioning sleeve and a rotating sleeve connected to one end of the positioning sleeve, the rotating sleeve is movably matched with the positioning sleeve in the circumferential direction, and the tail end of the rotating sleeve is a sand sweeping end; the driving mandrel is arranged in the sleeve assembly in a penetrating mode and can axially move relative to the sleeve assembly, and the end, close to the positioning sleeve, of the driving mandrel is connected with a drawing steel cable; the transmission assembly comprises a spiral groove formed in the peripheral face of the driving mandrel and a transmission piece arranged on the inner wall of the rotating sleeve, and the transmission piece protrudes out of the inner wall of the rotating sleeve and is matched with the interior of the spiral groove. Based on the technical scheme, the underground gravel depo