Liquid membrane separation device allowing automatic cleaning

The invention discloses a liquid membrane separation device allowing automatic cleaning. The device comprises a thermostatic bath, a liquid storage component, a temperature control component, a returnpipe group, a main pipeline and a membrane separation component, wherein the membrane separation assembly comprises a plurality of membrane separators; one part of the return pipe group, the membraneseparator and the main pipeline are arranged in the thermostatic bath; each of the plurality of membrane separators is provided with a liquid separation pipe group; each liquid distribution pipe group extends out of the thermostatic bath; the return pipe group is arranged between the liquid storage assembly and the main pipeline; the backflow pipe set is further provided with a high-pressure pump, wherein a total pressure meter is arranged at one end of the main pipeline; first branch pipes corresponding to the multiple membrane separators are formed at the other end of the main pipeline; each first branch pipe is pro