Circuit board etching device

A circuit board etching device comprises a supporting plate, a conveying assembly and a spraying module. The number of the supporting plates is two, the supporting plates are symmetrically arranged, a plurality of conveying rollers are arranged between the supporting plates, every two adjacent conveying rollers are connected through a belt, and one conveying roller is connected with the output end of the power mechanism. The conveying assembly comprises a plurality of conveying rollers arranged above the conveying rollers, the two ends of each conveying roller are sleeved with bearing plates moving in the opposite directions, the conveying rollers are sleeved with the other ends of the bearing plates, the bearing plates are provided with first rolling wheels and second rolling wheels which rotate around the axes of the first rolling wheels, the conveying rollers are sleeved with the first rolling wheels, and the conveying rollers are sleeved with the second rolling wheels. The conveyor is used for conveying c