The invention provides a visual detection method for CL-20 coating uniformity, which comprises the following steps: step 1, coating 7-hydroxyl dimethyl all-carbon spirocoumarin to obtain a coating product MOF-808-coumarin; step two, CL-20 coating: sequentially adding a melamine formaldehyde resin prepolymer, methylbenzene, CL-20 and the MOF-808 coumarin prepared in the step one, adding a citric acid catalyst, performing ultrasonic dispersion uniformly, stirring for in-situ polymerization, filtering, and naturally airing to obtain a coating product, namely a CL-20 coating product; and 3, visual detection: directly irradiating the coated product obtained in the step 2 by using an ultraviolet lamp so as to visually detect the uniformity of the coated product according to the solid-state fluorescence distribution condition. According to the visual detection method, after CL-20 coating is carried out, uniformity visual detection is carried out, the method is simple and convenient, and the efficiency of uniformity detection after CL-20 coating can be effectively improved.