The three in one set of continuous flow reactors independently developed, designed and manufactured by Philips chemical integrates microchannel reactor, tubular reactor and fixed bed reactor. Customers can choose to use a certain type of reactor alone according to reaction conditions, or use the reactors in series or in parallel, so as to realize liquid-liquid phase reaction, gas-liquid phase reaction, liquid-solid (catalytic) reaction and gas-liquid-solid three-phase (catalytic) reaction.