Urea filling system

The invention discloses a urea filling system, and relates to the technical field of filling systems. The urea filling system comprises a filling pipe connected with a urea tank; the other end of thefilling pipe is connected with a filling joint; a connecting seat is arranged at a filling port of the urea tank, and is provided with a liquid through guide sleeve and exhaust vents; the filling pipeis fixedly connected with the connecting seat, and comprises a ventilating pipe and a liquid through pipe arranged in the ventilating pipe; the liquid through pipe communicates with the urea tank through the liquid through guide sleeve; the ventilating pipe communicates with the urea tank through the exhaust vents; the filling joint is provided with air outlets and a flow guide barrel connected with the liquid through pipe; and the air outlets communicate with the ventilating pipe. The problems that the filling velocity of an existing long-distance urea filling system is low and overflowing occurs during filling are s