Slope sand collecting device

The invention relates to the related technical field of sand flow monitoring, and particularly relates to a slope sand collecting device which comprises a collecting barrel and a sand collecting assembly. The sand collecting assembly comprises a rotating column and a plurality of rotating plates arranged on the rotating column, sand collecting plates are arranged in the rotating plates, and a plurality of sand collecting grooves are formed in the rotating plates; and collected sand is discharged into a collecting barrel through cooperation of a sand collecting groove and a sand collecting plate, the end of a rotating plate is connected with a driving blade so that the sand collecting plate can adjust the position of the sand collecting plate to meet the requirement for monitoring work of sand flow in different wind directions, and the automatic cleaning function of the sand collecting plate is achieved through cooperation of a water collecting tank and a communicating assembly. And the drainage assembly arran