The invention discloses an automatic adjusting and winding displacement device for photovoltaic welding strips and belongs to the technical field of photovoltaic welding strips. The automatic adjusting and winding displacement device comprises a mounting support, a positioning mounting plate is connected to the rear side wall of the mounting support through screws, and a height limiting componentis connected to the left side wall of the mounting support through screws. A stepping motor is mounted at the top end of the mounting support, a coupler is mounted at the bottom of the output end of the stepping motor, and the bottom of the stepping motor is connected with a nut lead screw mechanism through the coupler. The bottom end of the nut lead screw mechanism is connected with a precise module mounting plate, the bottom end of the precise module mounting plate is provided with a distance detecting device, and an arched frame is connected to the front wall of the precise module mountingplate through screws. The upper left side of the front wall of the arched frame is connected with a large guide wheel through a rotary shaft. The automatic adjusting and winding displacement device has the characteristics that the structure is simple, reasonable, easy to use, high in cost performance, high in reliability and the like, and the effects that the winding efficiency is high, the yieldis high, the operation fatigue is relieved, and the manual cost is reduced are achieved.