Mechanical lock type antitheft manhole cover

The invention discloses a mechanical lock type antitheft manhole cover. The mechanical lock type antitheft manhole cover comprises a manhole cover body and a hole mouth seat which are used in cooperation. A vertical opening is formed on the axis of the manhole cover body. A vertical column is movably connected in the vertical opening. The lower end of the vertical column extends to the lower portion of the manhole cover body and forms a rotating plate in an integral forming manner. A containing cavity is formed in the vertical column. A T-shaped position adjusting rod is in sliding connectionin the containing cavity. The upper end of the position adjusting rod penetrates through the containing cavity and is symmetrically hinged with two first stirring blocks. Two second stirring blocks are symmetrically hinged to the upper end of the vertical column. An angle disc is concentrically embedded at the upper end of the manhole cover body. The mechanical lock type antitheft manhole cover has the advantages that the