Railway ballast screen cleaning device

The utility model discloses a railway ballast cleaning device which comprises an excavating mechanism and a ballast lifting mechanism, the excavating mechanism comprises a driven chain wheel, an excavating chain, an excavating beam, a main driving chain wheel and a rotary motor, and the excavating chain is connected with the driven chain wheel and the main driving chain wheel; a stand column is arranged on the upper side of one end of the excavating mechanism, a connecting mechanism is arranged at the upper end of the stand column, a first rotary driving mechanism and a second rotary driving mechanism are arranged on the two sides of the connecting mechanism respectively, and a pair of parallel suspensions is fixedly arranged on the two opposite sides of the stand column. The ballast lifting mechanism comprises a mounting shell and a ballast lifting chain assembly, a driving wheel assembly and a driven wheel assembly are arranged in the mounting shell, and a ballast lifting chain drive is arranged on the oute