Automatic powder spreader

The utility model relates to an automatic powder spreader which comprises a vibration screen, a motor, an eccentric block mounted on a motor shaft, and a motor housing, wherein the vibration screen is respectively connected with a longitudinal support part and a transverse support part through a flexible part and a connecting part, the motor is fixed on the exterior of a screen ring of the vibration screen, an axis is positioned in the horizontal position, and an auxiliary screen for sharing the weight of chemical powder, reducing the load of the vibration screen and improving the powder spreading capability is also arranged in the vibration screen. The auxiliary screen is independently suspended on the support parts, the screen bottom of the auxiliary screen is composed of a plurality of angle-adjustable vanes, and the angles of the vanes are adjusted to control the gaps of the vanes. The automatic powder spreader has the advantages that the structure is simple, the cost is low, the screen is stable and cannot incline, the vibration strength is higher, the service life of the motor is longer and the adaptability is wider, and the automatic powder spreader is mainly used for silkworm breeding and also can be used for powder spreading in medical treatment and public health units.