The utility model discloses a sand washing device, include: first pond, first pond have first entry and first export, and the first exit in first pond is provided with first sieve, is provided with a plurality of first sieve meshes on the first sieve, and first entry setting is in the upper portion of the lateral wall in first pond, second pond, second pond have the second entrance and second export, the the second entrance and the first sieve mesh intercommunication in second pond, and the second exit in second pond is provided with the second sieve, is provided with a plurality of second sieve meshes on the second sieve, and the inscribed circle diameter of second sieve mesh is less than the inscribed circle diameter of first sieve mesh, third pond, third pond have third entry and third export, and the third entry communicates with the second sieve mesh of second sieve. The embodiment of the utility model provides an in sand washing device handle carrying out two secondary settlement to sand cleaning fluid, must pass through the second grade and subside ability energy current to sand washing and enter the mouth after sand cleaning fluid returns out, increase substantially the settling time, prevent that the grit that returns out from getting into the pit shaft again.