The utility model discloses a sole gluing device which comprises side plates on the two sides, a conveying structure is arranged between the side plates, the conveying structure comprises a conveying belt, a plurality of embedded grooves are formed in the conveying belt at equal intervals, clamping plates are movably arranged on the four edges in the embedded grooves through elastic parts, end plates are fixedly arranged at the upper ends of the centers of the side plates, and the end plates are connected with the clamping plates. A top plate is fixedly arranged between the upper ends of the end plates, an adjusting plate is arranged at the lower end of the top plate through an adjusting part, a first moving block is movably arranged at the lower end of the adjusting plate through a first moving structure, a gluing structure is fixed to the lower end of the first moving block, and second moving blocks are movably arranged on the corresponding sides of the end plates through second moving structures. A bottom plate is fixedly arranged on the face, away from the end plate, of the second moving block, a baffle is fixedly arranged between the bottom plate and the upper end of the bottom plate through bolts, and a mold hole is formed in the position, corresponding to the shoe sole, of the center of the baffle. The shoe sole gluing device is not prone to polluting a conveying belt and the side faces of shoe soles and high in gluing efficiency.