Propylene epoxidation reaction method

The invention relates to a propylene epoxidation reaction method, which mainly solves the problem that methods for catalyzing epoxidation of propylene by adopting a molybdenum Schiff alkali compound are undisclosed in the previous literatures. According to the method, tert-butyl hydroperoxide and propylene are taken as raw materials and are in contact with a catalyst for 1-12 hours to generate propylene epoxide under the conditions that the reaction temperature is 40-120 DEG C, the reaction pressure is 0.5-5 Mpa and the molar ratio of the tert-butyl hydroperoxide to the propylene is 1:(1-10), wherein the catalyst is an acetylacetone isonicotinic acid hydrazide molybdenum complex, the chemical structural formula of the acetylacetone isonicotinic acid hydrazide molybdenum complex is shown in the specification, and the technical scheme that R1 is selected from -OHR2 or R2 is CnH2n+1, and n is 2-10 better solves the problem. The method can be applied to the industrial production of propylene epoxide prepared through propylene epoxidation reaction.