The utility model discloses an integral prefabricated type CLT (cross-laminated timber) girder bridge based on steel edge stiffening, which comprises an upper bridge structure and a lower bridge structure, wherein the upper bridge structure is formed by assembling a plurality of CLT wooden girder slabs, a spandrel girder of the girder bridge with a bridge deck of the girder bridge is arranged at the upper part of the upper bridge structure, each CLT wooden girder slab comprises a girder body structure formed by gluing multiple layers of wooden laminates and angle-protecting steel edges which are fastened and buckled on upper and lower edge angles at the front and the back ends of the girder body structure and used for integral reinforcement of the edge angles, the number of the layers of multiple layers of wooden laminates is at least three, and mounting gaps corresponding to the structure and the size of the angle-protecting steel edges are correspondingly arranged on the upper and the lower edge angles at the front and the back ends of the girder body structure. The integral prefabricated type CLT girder bridge is light in weight, environment-friendly, simple in structure, reasonable in stress, convenient in construction and good in coordination with an ambient environment, and can solve the problems that the bridge structure in the existing bridge is poor in coordination ability with the ambient environment, the wooden structure bridge is easy to be corroded by water and other natural factors, the field construction is difficult and the like.