Hydraulic excavator oil-water separator mounting structure and hydraulic excavator

The utility model discloses a hydraulic excavator oil-water separator installation structure and a hydraulic excavator. The hydraulic excavator oil-water separator installation structure comprises a support I, a base plate, a support II and an installation plate. The bottom of the bracket I is mounted on the rigid supporting surface; the base plate is mounted at the top of the bracket I, so that a preset distance is reserved between the base plate and the rigid supporting surface, and a through hole is formed in the base plate; the bottom of the bracket II is mounted on the base plate; a mounting plate is mounted at the side part of the bracket II through a plurality of shock absorbers, an oil-water separator is mounted on the mounting plate, and a water cup at the bottom of the oil-water separator extends out of a base plate through a through hole, so that a worker can conveniently maintain the oil-water separator in daily life; the mounting fulcrum of the oil-water separator is fixed on the bracket through