The invention discloses a multi-wire automatic shearing tin pick-up treatment device, and relates to the technical field of industrial automation. The device comprises a machine body, a loading mechanism, a peeling device and a tin pick-up treatment device are sequentially arranged on one side of the top of the machine body from left to right, a position sensor, a first welding gun, a second welding gun, a third welding gun and a fourth welding gun are sequentially arranged on the other side of the machine body from right to left, the peeling device comprises a left and right adjusting base plate, the top of the left and right adjusting base plate is provided with a front and back adjusting base plate, the top of the front and back adjusting base plate is provided with a jacking air cylinder supporting plate. According to the electronic line welding pretreatment device, the peeling device and the tin pick-up treatment device, trimming tin pick-up pretreatment before welding of the electronic connecting line can be achieved, the rear face and a terminal are better in compatibility during welding, the phenomenon that after line cutting, direct welding is carried out, tin pick-up is not uniform, and welding spots are not full is solved, and the welding quality is improved.