Vibratory feeder is a new type of vibratory feeder designed for uniform conveying of bulk materials before crushing and screening medium coarse crusher. The machine adopts the structural characteristics of double eccentric shaft exciter to ensure that the equipment can withstand the impact of falling bulk materials, and the feeding capacity is large. In the production process, the bulk and granular materials can be uniformly, regularly and continuously given from the storage bin to the receiving device, so as to prevent the receiving device from crashing due to uneven feeding and extend the service life of the equipment. The feeder can be divided into steel plate structure and grate structure. The feeder of steel plate structure is mostly used in the sand and stone production line to evenly feed all the materials into the crushing equipment. The feeder with grate structure can coarse screen the material, so that the system is more economical and reasonable in preparation, and has been used as an essential equipment in crushing and screening. Therefore, it is widely used in crushing and screening equipment of metallurgy, coal mine, mineral processing, building materials, chemical industry, abrasive and other industries.