The invention provides a marking system. The marking system comprises a feeding module, a carrying module and a marking module. The feeding module is used for conveying workpieces to the carrying module, and the carrying module is arranged between the feeding module and the marking module in order to carry the workpieces conveyed by the feeding module to the marking module for marking treatment. The marking system further comprises a dust removal module. The dust removal module comprises a first dust removal mechanism and a second dust removal mechanism. The first dust removal mechanism is adjacent to the marking module and used for absorbing dust generated in the marking process. The second dust removal mechanism comprises a dust removal frame, a motor, a roller brush and an ion air knife. The dust removal frame is arranged on the feeding module, the motor is arranged on the dust removal frame, the roller brush is rotationally arranged on the dust removal frame and connected with themotor, the motor drives the roller brush to rotate to carry out dust removal treatment on the flowing marked workpieces, and the ion air knife is arranged on the dust removal frame to remove the dust,containing static, on the workpieces.