The invention relates to a cold bending moulding machine and an electric cutting device of the cold bending moulding machine is provided. The cold bending moulding machine comprises a machine frame, aportal frame, a lower cutting board, a lower blade and an electric cutting device. The studs of the portal frame are vertically fixed on the machine frame. The lower cutting board and the lower bladeare fixed on an angle seat. The electric cutting device comprises an electric speed reducer, a main shaft, a plurality of eccentric wheels, a connecting rod, an upper cutting board and an upper blade. The eccentric wheels are eccentrically sheathed on the main shaft. The upper end and the lower end of the connecting rod are respectively and fixedly connected with the axle centers of the eccentricwheels, the external diameters of which are installed with bearings, and the upper cutting board to form a crank and connecting rod mechanism. The eccentric wheels are driven to rotate by the electric speed reducer so as to lead the upper blade to move downwards to cut materials. With further improvement, the invention also comprises an upper blade guiding device, an upper blade gap regulating device, a regulating device for regulating the flatness and the straightness of the lower blade and a material-pushing device. As the eccentric wheels is driven by adopting a motor to drive the upper cutting board to make up and down movement to complete cutting, the cold bending moulding machine has simple structure and low cost by requiring no hydraulic system.