The invention discloses a chain-type electric window opening device which comprises a device body, a window opening device, a sweeping device and a limiting device, wherein the window opening device,the sweeping device and the limiting device are arranged in the device body; the window opening device comprises a first working cavity arranged in the device body; a first sliding block is connectedinto the first working cavity in a sliding fit manner; a first spring of which the lower end is fixedly connected with the lower side end wall of the first sliding block is fixedly arranged on the lower end surface of the first sliding block; a motor is fixedly arranged in the first sliding block; a first rotating shaft which extends upward and downward is fixedly arranged on an output shaft of the motor; a second working cavity is arranged in the part far away from the upper side end wall of the first working cavity; and a first bevel gear is fixedly arranged at the upper end of the first rotating shaft. The chain-type electric window opening device can be driven by the motor to automatically open and close a window, thereby reducing the manual operation time; and the chain-type electricwindow opening device can further be used for automatically cleaning the window, thereby improving the convenience.