The utility model relates to a water vapor mixing formula screen printing screen washs deciduate machine belongs to cleaning equipment. Solution tank, circulation tank and air pump lie in the inside below of frame respectively, filter equipment and this circulation tank top fixed connection, and deciduate case and frame middle part fixed connection, half tone seat system lies in the centre of this deciduate case, and cleaning system lies in half tone seat system riser both sides, is connected above half tone seat system riser and the half tone seat system. The advantage is novel structure, has realized screen printing screen's washing, the drawing of patterns and air -dry integration, has solved the problem of manual cleaning drawing of patterns inefficiency, can rinse the drawing of patterns to the half tone of different models and air -dry, has increased the application scope of machine, adopts circulating water and steam to rinse the water consumption that can significantly reduce, water economy resource for the main part.