The invention provides an electric waist auxiliary exoskeleton. The electric waist auxiliary exoskeleton comprises a back plate (1), shoulder straps (2), a driving actuating device (3), thigh sleeves(4), a left thigh connecting rod (5) and a right thigh connecting rod (6), wherein the upper end of the back plate (1) is connected with the shoulder straps (2), the lower end of the back plate (1) isconnected with the driving actuating device (3), two sides of the driving actuating device (3) are connected with the left thigh connecting rod (5) and the right thigh connecting rod (6), and the thigh sleeves (4) are arranged on the left thigh connecting rod (5) and the right thigh connecting rod (6). The electric waist auxiliary exoskeleton is simple and reasonable in structure, small, exquisite and light, the electric waist auxiliary exoskeleton is worn through the shoulder straps and the thigh sleeves, after wearing, the driving actuating device is located on the waist and can assist thewaist in bending down and stretching, a slider, a hip flexion curve and a hip extension line are adopted, auxiliary force control is executed through a series elastic actuation method, and stooping and squatting actions of a wearer are supported.