A gas flow control device for a gas cooker, comprising: a fuel gas inlet, a fuel gas outlet, a control module and at least one control valve; wherein the control valve comprises a valve body, a valve core, a reset device and an electromagnetic converting device; wherein the valve body comprises an gas inlet, an gas outlet, a bushing and a nozzle; wherein the electromagnetic converting device is disposed on the bushing; wherein the control module is used for opening the control valve and controlling power supplied to the electromagnetic converting device; and the control module is further used for controlling a frequency of a periodic opening and closing operation of the control valve; wherein the at least one control valve is configured such that when the control valve is opened, gas sequentially flows through the fuel gas inlet and the control valve, and then flows toward the fuel gas outlet, and the control valve alternately opens and closes an airflow passage by which the gas flows through the control valve; and when the control valve is not opened, the valve core butts against an inner wall of the valve body under the action of the reset device, and then closes an airflow passage by which the gas flowing in from the gas inlet flows toward the gas outlet; and wherein the electromagnetic converting device is used for generating magnetism after receiving the supplied power, drawing the valve core to move, and then opening the airflow passage by which the gas flowing in from the gas inlet flows toward the gas outlet; and after the supplied power disappears, the magnetism disappears, and the valve core again butts against the inner wall of the valve body under the action of the reset device, characterised in that the control valve further comprises a containing portion adapting to the shape of the valve core wherein the containing portion is disposed on the inner wall of the valve body between the gas inlet and the gas outlet; in that the gas outlet is disposed on the nozzle and the gas inlet is disposed on the bushing; and in that the valve core is of a spherical structure. a fuel gas inlet, a fuel gas outlet, a control module and at least one control valve; wherein the control valve comprises a valve body, a valve core, a reset device and an electromagnetic converting device; wherein the valve body comprises an gas inlet, an gas outlet, a bushing and a nozzle; wherein the electromagnetic converting device is disposed on the bushing; wherein the control module is used for opening the control valve and controlling power supplied to the electromagnetic converting device; and the control module is further used for controlling a frequency of a periodic opening and closing operation of the control valve; wherein the at least one control valve is configured such that when the control valve is opened, gas sequentially flows through the fuel gas inlet and the control valve, and then flows toward the fuel gas outlet, and the control valve alternately opens and closes an airflow passage by which the gas flows through the control valve; and when the control valve is not opened, the valve core butts against an inner wall of the valve body under the action of the reset device, and then closes an airflow passage by which the gas flowing in from the gas inlet flows toward the gas outlet; and wherein the electromagnetic converting device is used for generating magnetism after receiving the supplied power, drawing the valve core to move, and then opening the airflow passage by which the gas flowing in from the gas inlet flows toward the gas outlet; and after the supplied power disappears, the magnetism disappears, and the valve core again butts against the inner wall of the valve body under the action of the reset device, characterised in that the control valve further comprises a containing portion adapting to the shape of the valve core wherein the containing portion is disposed on the inner wall of the valve body between the gas inlet and the gas outlet; in that the gas outlet is disposed on the nozzle and the gas inlet is disposed on the bushing; and in that the valve core is of a spherical structure.