The invention relates to packaging bag tying equipment, in particular to an electric tying machine comprising a frame, a push bar, and a push bar drive mechanism; the push bar drive mechanism comprises a power portion and a transmission portion; the power portion comprises a motor; the transmission portion comprises a crank, a middle link, an output link, and an auxiliary link; one end of the middle link is connected with the crank; the other end of the middle link is connected with the corresponding end of the output link and the correspond end of the auxiliary link; the output link is connected with the push bar; the auxiliary link is connected with the frame; the output link and the auxiliary link are in V-shape distribution. By the use of the electric tying machine, the problems that the existing automatic tying machine is complex in structure and high in cost and fails easily are solved.