Abstract: A glue-stopping element for a glue-coating device has a driver element and a ball valve. The ball valve, which is clasped between an upper splint and a lower splint, is driven by the driver element to alternately rotate clockwise and counter-clockwise, thereby starting or stopping the glue flow quickly. A biasing ring is mounted in a ring channel in the upper splint so that when the ball valve is worn and damaged due to the extended use, the upper splint will remain abutted the ball valve due to the pressure of the biasing to prevent glue from overflowing into the periphery of the ball valve.