The invention relates to a bridge construction device, more specifically to a bridge construction laying device comprises a box body, a counterweight sandbox, a lifting box, a gripping device, a concrete box, a cab, a hydraulic supporting box, a box body lead screw, a mobile supporting box, a box body lead screw motor base, a box body lead screw motor, moving devices, a bridge steel structure default plate and bridge piers. Problems that time and labor are wasted because a bridge is manually laid from two ends of the bridge to the middle part of the bridge during construction, people are easyto fall off when performing construction at the upper end of an unconstructed bridge during erecting a viaduct and a longer bridge and building materials are very difficult to transport during building the viaduct and the longer bridge are solved; a sand inlet and a sand outlet are formed in the upper end of the counterweight sandbox; a sand inlet is welded in the upper end of the counterweight sandbox; and a sand outlet is welded in the left end of the counterweight sandbox.