Non-cap type fuel tank cap

The invention provides a non-cap type fuel tank cap which is provided with a shell and functional parts wrapped by the shell. The functional parts comprise a cover with hooks arranged on the side face, an upper shell body, a valve mounted on the upper shell body, an oil gun recognition module and a lower shell body accommodating the oil gun recognition module, wherein the cover and the upper shell body are fixed through the hooks, and the shell is provided with open holes corresponding to the hooks. The open holes corresponding to the hooks of the cover are formed in the shell, when the cover needs to be replaced, the cover of the non-cap type fuel tank cap is dismounted from an oil tube through a screwdriver and pull equipment, the oil tube does not need to be replaced, cost is reduced, operation is simple, and consumed time is short.