Abstract: In order to optimize the explosion puffing drying technology of muskmelon, single factor experimental design was used to analyze the effects of 3 variables including pre-drying time, expanded temperature and evacuated time on the hardness, brittleness, moisture content and color, and technological parameters were optimized through response surface experiments.Two regression models describing the 4 indexes were derived according to the experimental data.The optimal process conditions for the puffing drying were pre-drying time of 207 min, expanded temperature of 84.5 ℃, evacuated time of 64.5 min.Under these conditions, the extruded products' hardness is 412 g, brittleness value is 4, moisture content is 10.28%, chromatic aberration value is 8.4, the fitting degree is good, and the product quality is excellent.