Filling valve

The invention discloses a filling valve. The filling valve comprises a valve pipe body and a piston rod movably installed in the valve pipe body; a pipe opening at the lower end of the valve pipe bodyis provided with a filling opening, an inlet hole is formed in the valve pipe body, and a space for communicating the inlet hole with the filling opening is reserved between the valve pipe body and the piston rod; and a plug capable of correspondingly blocking the filling opening is arranged at the lower end of the piston rod, and the inner wall of the filling opening corresponds to the outer side wall of the plug; and the plug is provided with a negative pressure vacuum anti-leakage hole, and a super-vacuum hole communicating with the anti-leakage hole is formed in the piston rod. Accordingto the filling valve, pressure impact is formed through symmetric structures of the piston rod and the filling opening, sudden flow is directly relieved, stability and oil non-splashing are kept in afilling working state, the