The invention provides an aluminum coil end surface welding system based on point and line laser. The welding system comprises a welding robot, wherein the welding robot comprises a central control module, a transportation control module and a mechanical arm; a welding assembly is driven to weld by the mechanical arm; the welding assembly comprises a welding gun head, a laser control module, a camera assembly and an image processing module; the laser control module comprises a point laser module and a line laser module; and when the end surface of an aluminum coil is welded, the welding robotmoves to a welding station, the aluminum coil is scanned and positioned first by the mechanical arm by using the point laser module, then both sides of the end face of the aluminum coil and both sidesof the center of the coil are scanned by using the line laser module so as to form a line laser feedback signal, the end surface of the aluminum coil is photographed by the camera assembly, the linelaser feedback signal and a photo of the camera assembly are identified by the image processing module so as to identify an available welding position as a welding point for welding, and the availablewelding position comprises the connecting position of the staggered layer and the smooth layer of the end surface of the aluminum coil. According to the aluminum coil end surface welding system, theend surface of the aluminum coil can be quickly and conveniently welded.