The invention discloses a padding finishing method for polyvinyl alcohol nonwoven fabric. The method comprises steps as follows: the polyvinyl alcohol nonwoven fabric is unreeled and guided into an impregnating tank, the nonwoven fabric is sufficiently impregnated by an impregnation liquid in the impregnating tank and then is rolled to be dry, dried through a drying channel and wound, and the polyvinyl alcohol nonwoven fabric subjected to padding finishing is obtained. With adoption of the padding finishing method, the polyvinyl alcohol nonwoven fabric without heat sealing performance originally is endowed with heat sealing performance of secondary processing, and realization of processes such as automatic mechanical edge sealing, opening sealing, continuous bag making and the like is facilitated, so that processing efficiency of a product is substantially improved, and cost is reduced; meanwhile, fiber nodes in the polyvinyl alcohol nonwoven fabric are firmer, and therefore, mechanical properties of the polyvinyl alcohol nonwoven fabric are further improved; besides, elongation at break of polyvinyl alcohol is increased, and accordingly, the polyvinyl alcohol nonwoven fabric becomes softer and more comfortable.