The utility model provides an antiseep type fast filling mounting structure and mining dump truck, antiseep type fast filling mounting structure includes mount pad, flange and filling connect, the mount pad welds on the fuel tank, and the filling connects installs on flange, and flange fixes on the mount pad, and the cover is equipped with seal gasket between flange and mount pad, the terminal surface of the mount pad that contacts with seal gasket is established to sinking the step face, should sink the height of step face and seal gasket's highly uniform, and the diameter size slightly is greater than seal gasket and flange's diameter size. The utility model discloses a fast filling mounting structure is rationally distributed for the antiseep type, and simple to operate, firm can effectively solve flange deformation, oil impregnate problem. Through process the step face at the mount pad, inhomogeneous the extruding of gasket that can avoid rubber gasket hardness harmfully to lead toincreases the clamp plate of certain intensity and thickness in the flange outer end, makes the flange atress even, avoids direct pressure of bolt to lead to the deformation of flange mounting face on flange, and the oil impregnate scheduling problem appears in seal failure.