A wireless pressure monitoring well against thief and water device,is composed of a well body posited with a wireless telegraphy device (8),a well loop (5) posited over the manhole of the loading structure top plate (4) under the well body,a waterproof cover plate (6) covered on the inner annulus platform in the bottom of the well loop and a well cover (14) covered on the mouth of the flange of the well loop,which is characterized in the waterproof cover plate 6)through the stop retaining plate (10) posited under the manhole of the loading structure plate(4), is assembled by the bolt (11) in the connection hole of the center of the stop retaining plate (10) and the water proof cover plate and the stop nut (13), is installed on the inner annulus platform of the bottom of well loop, the well cover (14) is joined with the bolt (11) screw section end by the center bolt (13) laid in the cover center groove and the anti-loss nut, the stop nut (13) and thief against nut are non standard nut of either five edges or seven edges.