The invention provides a kitchen oil smoke cleaning agent liquid formula with time-delay film formation, strong base is not used as a main component, and the formula is composed of a low-irritation nontoxic surfactant, a film forming agent, a film forming auxiliary agent, an environmental protection solvent, a brightener, an antiseptic, a pH regulator and essence. The cleaning agent is uniformly sprayed on a range hood, kitchen tiles and other hard surfaces, and oil stain can be erased timely; the cleaning agent can be sprayed on cleaned surfaces, such as walls, after the solvent is volatilized, a transparent film is formed; after a period of usage, the film can be directly tore when use feel the wall has oil stains, so that effects for cleaning and beautifying kitchen and protecting the surfaces are realized at the same time, and different requirements of users are met at the same time. The cleaning agent is different from traditional aqua, and does not flow, residuals do not appear on the surfaces, after the film is tore or wiped.