Defect detecting and screening system

The invention provides a defect detecting and screening system, and relates to the technical field of defect detecting and screening, the defect detecting and screening system comprises a transmission device block, a vibration fixing device main body, a vibration device, a screening transmission device and a device main body, the transmission device block is fixedly installed outside the device main body, and the vibration fixing device main body is movably connected with the vibration device; the device comprises a device body, a screening and conveying device is fixedly installed on the device body, a crawler belt conveying and sorting assembly is movably connected to the exterior of the screening and conveying device, a base vibration fixing block is fixedly installed on the exterior of the device body, and a third fixing block is fixedly installed on the exterior of the base vibration fixing block. Whether defect looseness and abrasion exist or not is judged by detecting changes of vibration signals throu