Muck dumper

The utility model discloses a muck dumper. The muck dumper comprises a dumper frame and a U-shaped compartment assembly which is installed on the dumper frame, wherein the U-shaped compartment assembly and a tray assembly are embedded together. The muck dumper is characterized in that a left guide rail longitudinal beam assembly and a right guide rail longitudinal beam assembly are installed at the upper ends of the two sides of the U-shaped compartment respectively, light rails and a plurality of rolling pulley assemblies are installed on the left guide rail longitudinal beam assembly and the right guide rail longitudinal beam assembly, tarpaulin mechanisms, sliding pulley mechanisms and rope wheel mechanisms are installed in the left guide rail longitudinal beam assembly and the right guide rail longitudinal beam assembly, tarpaulin is fixed to a tarpaulin connecting plate through a tarpaulin support, a speed reducer is driven by a forward-and-reverse rotating motor to drive a steel wire rope, and a tarpaulin formwork is driven by the steel wire rope to move longitudinally along compartment guide rails; scattering and leakage of muck can be completely prevented when the muck dumper is used, the bottom surface of a compartment is smooth, unloading is rapid, cleaning is convenient, and environmental friendliness and dust prevention are achieved; meanwhile, operation can be conducted by one person, both time and labor are saved, and the tarpaulin can be folded stably and is easy to replace.