The present invention relates to a splicing device for blunt splicing of an adhesive strip. The splicing device comprises two splicing beam pairs each comprising an upper splicing beam and a lower splicing beam, and splicing strips of rack formats are arranged on the splicing beams respectively. The upper splicing beam can move to a descended splicing position vertically from a risen non-working position relative to the lower splicing beam vi a first driving device, and one splicing beam pair can move horizontally at the splicing positions, relative to the other splicing beam pair by a second driving device, when the respective racks are meshed mutually, wherein the first driving device of each splicing beam pair comprises two lead screw transmission devices and the corresponding servo motors, each lead screw transmission device comprises a lead screw driven by the servo motor and rotatably supporting the lower splicing beam and a nut moving on the lead screw and coupled with the upper splicing beam, and a piston cylinder unit for limiting the pressure of a strip piece clamped between the upper and lower splicing beams at the splicing position is arranged between the nut and the upper splicing beam.