The invention discloses an impurity removing device for an oil inlet of an oiling machine. The impurity removing device comprises a flow guide disc, a filter shell, oil outlet nozzles and an oil inletshell. A flange plate is fixedly installed on the top of the oil inlet shell. Threaded holes are fixedly formed in the edge of the flange plate. The flow guide disc is fixedly welded to the inner wall of the top of the oil inlet shell. An oil collecting opening is fixedly formed in the center of the flow guide disc. An oil pump is fixedly installed at the connecting position of the bottom of theoil collecting opening and a pipeline. The oil pump is fixedly installed on the inner wall of the upper portion of the oil inlet shell through a screw. An electric control valve is connected to the output end of the oil pump through a pipeline. The output end of the electric control valve is fixedly connected with four branch oil pipes, and the ends, away from the electric control valve, of the branch oil pipes are fixedly connected to the top of the filter shell. The outer wall of the filter shell is fixedly welded to the oil inlet shell. The impurity removing device can be used for filteringoil materials, the quality of the oil materials can be better improved, and the influences of impurities in the oil materials to the service life of an automobile are avoided.