A peeling mechanism configured to cooperate with a mechanical arm to remove a protecting film from a workpiece can include a driver, two clamping members coupled to the driver and spaced from each other, and two cutting members respectively coupled to the clamping members oppositely to each other. Each cutting member can include a protruding end extending towards the other cutting member. The protruding end protrudes out of the clamping member. The driver can be configured to move the two clamping members towards each other.