Based on the analysis of particle motion and the geometric structure of scraper structure, a low-speed and high-precision scraper feeder applied to the jet mill system is developed to solve the problem of the accuracy limitation of the existing feeder under low feeding volume. The scraper profile of the feeder is designed as Archimedes spiral, which realizes the uniform force of particles throughout the scraper and solves the problem of uneven mass flow rate of linear scraper. By selecting a particle size of 150 μm graphite particles as the research object, the feeder performance tests are carried out under different scraper heights and rotating speeds. The results show that the scraper feeder has good accuracy and feeding linearity in the feeding range of 1~60 g/h, and the feeding performance meets the needs of the jet mill system, which has high practicability.