The invention provides a stepped low-pressure electrochemical assisted polymer-bearing wastewater demulsification treatment process method. The process method comprises the steps that treatment is performed by adopting stepped low-pressure electrochemical reactors A and B which are periodically switched, upper-layer, middle-layer and lower-layer electrode plates are arranged inside the reactors, the separation distance of the bottom layer is maximum, the separation distance of the middle layer is moderate, and the separation distance of the upper layer is minimum. Water inlets and air inlets are formed in the bottoms of the reactors, water outlets and air outlets are formed in the tops, and the reactors are connected with an independent direct-current power supply. When polymer-bearing wastewater is heated to reach 70-90 DEG C, the wastewater is firstly fed into the reactor A for electrified electrolysis, meanwhile an inert gas purging valve is closed, the reactor B is not electrified, meanwhile an inert gas purging valve is opened, the operating states of the two reactors are switched after a switching period is reached, namely the reactor A is not electrified, meanwhile the inert gas purging valve is opened, the reactor B is electrified for electrolysis, and meanwhile the inert gas purging valve is closed. The switching period is 30-600 seconds, and sequentially cyclic switching is performed according to the logic, and the polymer-bearing wastewater enters a nest unit after treatment.