The invention relates to an improved steam flow-adjustable electric kettle. The improved steam flow-adjustable electric kettle includes a kettle body and a kettle cover. The improved steam flow-adjustable electric kettle is characterized in that an open hole is formed in the kettle cover; and a shielding structure used for opening or closing the open hole is installed in the open hole. The shielding structure can be adjusted, so that the size of the open hole can be controlled, and therefore, the air exhaust rate of water steam can be controlled, and as a result, the boiling time of water can be effectively prolonged, and residual chlorine in the water can be reduced.