Stone ballast screening trolley

The utility model provides a stone ballast screening trolley, and relates to the technical field of rail transit. The device comprises a frame unit, a screening unit and a dirty soil conveying belt, the screening unit comprises a shell, a driving assembly, a screening cage and a storage assembly, the shell is connected to the frame unit, the two ends of the shell are connected with the driving assembly and the storage assembly respectively, and the screening cage is in driving connection with the driving assembly and located in the shell; the dirty soil conveying belt is located below the shell and rotationally connected with the frame unit, the stone ballast screening trolley can complete stone ballast and soil separation in the walking process and meanwhile conduct stone ballast backfilling on the lower portion of a sleeper through separated stone ballasts, and the separated dirty soil is conveyed to the outer side of a side slope through the dirty soil conveying belt or recycled through other recycling equ