The stability of powder feeding is important to guarantee the quality of the laser remanufacturing. In order to detect and control the powder flow, a new powder feeding device is designed for laser remanufacturing. Scraper-type conveyer and capacitance sensor are used into the device which is tested by 2Cr13 and H13 powder. The results show that: Using H13 metal powder as medium will get a better effect，and when the changes of powder density are more than 10-1g/min, the device acts better distinguish-ability. The experimental results demonstrate that the system can be used to control the steel base powder feeding.