The invention relates to a recyclable environment-friendly cleaning agent. The cleaning agent is prepared through the following steps: uniformly stirring film former, modified reinforcer and water at a reaction temperature of 85-130 DEG C, and screening, wherein the weight ratio of the film former, the modified reinforcer and the water is (10-60):(0.1-20):(10-200); the modified reinforcer is prepared by uniformly stirring reinforcer, polyvinyl alcohol, surfactant and water at a reaction temperature of 90-120 DEG C; and the weight ratio of the reinforcer, the polyvinyl alcohol, the surfactant and the water is 100:(35-60):(3-10):(50-150). The cleaning agent provided by the invention has the advantages of excellent film forming property, strippability, low consumption, strong dirt-removing power, simple and quick operation, portability, greenness, environment friendliness, low cost and the like; and the cleaning agent is recyclable, causes no damage to the surface of a cleaned article and leaves no water stain.