Provided is a multifunctional F-shaped valve key. An upper force transfer rod and a lower force transfer rod are arranged on the head portion of a pull rod, and an open spanner is arranged in the opposite direction of the upper force transfer rod and the lower force transfer rod. A movable spanner is arranged at the tail portion of the pull rod. The multifunctional F-shaped valve key with the structure has multiple functions and can be used for opening or closing a large valve and a small valve and rotating hexagon nuts and screws of various specifications, tool use efficiency is improved, carried tools are reduced, and operation use is facilitated. The valve key has the advantages of being reasonable in design, simple in structure, safe and reliable in use and operation and the like, and can serve as a tool for opening and closing the valves.