The invention discloses a prefabricated reinforced concrete prefabricated type self-weight sinking shaft. The shaft is formed by assembling multiple shaft lining modules which are arranged with staggered joints, and the lower side of the bottom shaft lining module is connected with a steel boot blade, and lifting pendants are embedded through rebar, arranged on the two sides of the upper portion of the shaft lining module and used for transportation hoisting of the shaft lining module; the shaft lining module is a sector-shaped concrete block, water stop strip grooves are formed in the top surface and the middles of the two sides of the shaft lining module, and water stop rubber strips are installed in the water stop strip grooves when the shaft lining module is spliced and assembled; theembedded rebar is embedded in the shaft lining module at the bottom of the shaft; the bottom end of the embedded rebar is welded to the top surface of the steel boot blade; a field process needing a lot of time is integrated and decomposed into a factory prefabricated module and assembly, not only is the construction quality of shaft body reinforced concrete guaranteed, but also the intermittent waiting period required for site sinking is gratly shortened.