The invention relates to a preparation method of interfacial polymerized film-like super absorbent resin, and the method comprises the following steps: adding acrylic acid, sodium hydroxide, a crosslinking agent and the like into deionized water, and controlling a neutralization liquid water phase with a neutralization degree of 55-75 mol%; dispersing an initiator in an oil phase, forming a layered interface between the water phase and the oil phase, and allowing the polymerization reaction to polymerize on the interface to form film-like super absorbent resin; directly compounding the upper and lower layers of the obtained film-like super absorbent resin with toilet paper to form a multilayer composite absorbent material. The method comprises forming the layered interface between the water phase and the oil phase through an interface polymerization reaction to allow the polymerization reaction to polymerize on the interface to form the film-like superabsorbent resin, and directly compounding the toilet paper on the upper layer and the lower layer of the obtained film-like super absorbent resin to form the multilayer composite absorbent material; and a super absorbent film of the acrylic system formed by special interfacial polymerization has higher resistance to lumping and liquid conduction diffusion.