PCB board cleaning mechanism for LDI exposure machine system

The invention belongs to the technical field of PCB (printed circuit board) processing, and provides a PCB surface cleaning mechanism for an LDI (laser direct exposure) machine system, which comprises a rack and a first conveying assembly for conveying a to-be-cleaned PCB, the second conveying assembly is used for conveying the cleaned PCBs; the first cleaning assembly is used for cleaning the A surface of the PCB; the second cleaning assembly is used for cleaning the surface B of the PCB; the first grabbing assembly is used for grabbing the PCB to be cleaned, conveying the PCB to the first cleaning assembly and conveying the PCB to the second grabbing assembly; and the second grabbing assembly is used for grabbing the PCB, conveying the PCB to the second cleaning assembly and conveying the cleaned PCB to the second conveying assembly. The PCB surface cleaning mechanism for the LDI exposure machine system is simple in structure, reasonable in design, capable of automatically cleaning the A surface and the B s