The invention discloses a continuous synthesis method and device of MSH.The continuous synthesis method of MSH comprises the steps that 2, 4, 6-trimethylbenzenesulfonyl
chloride and an acid binding agent are dissolved in a first
solvent to form a first solution, N-hydroxy-
acetic acid imino
ethyl ester is dissolved in the first
solvent to form a second solution, and the second solution is dissolved in a third
solvent to form a second solution; respectively pumping the first solution and the second solution into a first reaction container for reaction to obtain a first
effluent; the first
effluent,
perchloric acid and a second solvent respectively flow into a second reaction container for reaction, and second
effluent containing MSH is obtained. According to the present invention, the flow chemical design idea is adopted to continuously synthesize MSH, the stability of the
raw material is good, the intermediate high-energy product and the high-energy end product can be rapidly utilized, and the accumulation and the long-time retention are effectively avoided so as to effectively avoid the
decomposition and reduce the
safety risk; the device disclosed by the invention is simple in structure, suitable for being matched with a
production line of MSH derivative products, and convenient for synthesizing MSH at present.