Manhole cover with protective construction mold ring

The invention relates to the technical field of municipal inspection wells, in particular to an inspection well lid with a protective construction mold ring, which comprises a mold ring base and a construction mold ring, the die ring base comprises a base body, an internal thread pipe fixedly arranged on the upper surface of the die ring base, and a first round pipe fixedly arranged on the upper surface of the base body and located on the inner side of the internal thread pipe; the construction die ring comprises a die ring body, an external threaded pipe fixedly arranged on the lower surface of the die ring body and in threaded connection with the inner wall of the internal threaded pipe, a second circular pipe fixedly arranged on the lower surface of the die ring body and in sliding sleeving connection with the outer wall of the internal threaded pipe, and a third circular pipe fixedly arranged on the lower surface of the die ring body and in sliding sleeving connection with the inner wall of the first circ