Oil injection lubricating system of concrete mixing plant

The utility model relates to an oil injection lubricating system of a concrete mixing plant, and belongs to the field of mixing plant mechanical maintenance, the oil injection lubricating system comprises an oil storage tank and an oil adding pipe, the oil adding pipe is fixedly arranged on the oil storage tank and communicates with the oil storage tank, and a circular ring is slidably arranged in the oil adding pipe and slides in the axis direction of the oil adding pipe; a plurality of mounting rods are arranged on the circular ring, the mounting rods are hinged to the circular ring, waterproof cloth is arranged among the mounting rods, the bottom of the waterproof cloth is fixedly arranged on the circular ring, and the edge of the waterproof cloth is fixedly arranged on the mounting rods. The diameter of the opening of the oil adding pipe is increased, the possibility that lubricating oil leaks from the opening of the oil adding pipe is reduced, and therefore the effect of reducing waste of the lubricating