Automatic screening and feeding system for spraying and seeding matrix on slope

The invention relates to an automatic screening and feeding system for spraying and seeding matrix on a slope. According to the automatic screening and feeding system, the efficiency can be improved,and the cost can be reduced. According to the technical scheme, the system comprises a coarse material collecting device, a coarse material conveying device, a screening device, a fine material collecting device and a feeding and conveying device, wherein the coarse material collecting device is used for collecting coarse materials in a centralized mode; the coarse material conveying device is used for conveying the coarse materials out of the coarse material collecting device; the screening device is provided with a screening barrel capable of rotating around the axis of the screening barrel,one end of the screening barrel is provided with a feeding port connected with the coarse material conveying device, and the other end of the screening barrel is a discharging port; the fine materialcollecting device is arran