The invention relates to an embedded part at the bottom of a prefabricated box girder and steel bar overall binding system. The system comprises a beam making pedestal, a binding mould, and a bottom formwork at the end part of the movable box girder, wherein the bottom formwork at the end part of the movable box girder is provided with a support and an anti-falling beam embedded part; the bindingmould is provided with a limiting slot which is arranged in coordination with the bottom formwork at the end part of the movable box girder; and the beam making pedestal is provided with a quick fixing device which is arranged in coordination with the bottom formwork at the end part of the movable box girder. The embedded part at the bottom of the prefabricated box girder and the steel bar overallbinding system and construction method provides the economically and technically feasible system and construction method to solve the problem of collision between the steel bar of a box girder body and the support and an anchor bar of the anti-falling beam embedded part.