The invention discloses a production method of an aluminum alloy sheet plate for welding, and relates to a production method of an aluminum alloy sheet. The method of the aluminum alloy sheet plate for welding aims to solve the problems that the welding performance of 0 state aluminum alloys for welding is poor and edge parts crack in the rolling process. The production method of the aluminum alloy sheet plate for welding comprises the following steps of 1, weighing smelting raw materials to prepare an aluminum alloy solution; 2, carrying out the fusion casting to obtain aluminum alloy cast ingots; 3, carrying out the plane milling treatment to the aluminum alloy cast ingots; 4, heating and then carrying out the hot rolling to obtain hot rolled semi-finished products; 5, carrying out the cold rolling to obtain semi-finished strips; 6, annealing the semi-finished strips; 7, carrying out the cold rolling to the semi-finished strips till the design thickness after annealing; and 8, annealing finished strips. According to the production method of the aluminum alloy sheet plate for welding, sodium salt modifiers are added during casting, the finished product annealing is carried out, and techniques of the casting, the hot rolling, the cold rolling, the intermediate annealing, the cold rolling and the annealing are sequentially carried out in the preparation process, so that the problem that the edge parts crack in the rolling process is solved, the problem that the uneven distribution of components leads to desoldering in the welding process, and the welding performance is improved. The method of the aluminum alloy sheet plate for welding is suitable for preparing the aluminum alloy sheet plate.