Device for loading circuit assembly line material supply for PCB (Printed Circuit Board) substrate

The invention discloses a feeding device for a PCB substrate loading circuit assembly line, which comprises a rack with a bedplate and a material box arranged on the rack, the bedplate below the material box is provided with a paperboard falling opening which is communicated up and down, and the front side of the paperboard falling opening is provided with a substrate sliding opening. The release paperboards are automatically separated from the alternate PCB substrates through the paperboard falling opening, and then the material box is pushed forwards at a constant speed, so that the PCB substrates automatically slide down towards an assembly line one by one. The material box is a rectangular frame with an upper opening and a lower opening, the paperboard falling opening is rectangular, and the upper surfaces of the two sides of the paperboard falling opening are provided with process edge side vertical faces used for laterally erecting process edges at the two ends of the PCB substrate. The PCB substrate st