The powder is collected manually by hand, and the powder flows into the powder overflow port through powder brush and powder collecting shovel, and then flows into the powder collection tank through a fixed pipeline, and finally cooperates with an explosion-proof vacuum cleaner to clean up the residual powder. To ensure no pollution during the cleaning process, to ensure the occu-pational health and safety of users, the entire cleaning process is carried out in a closed cabin environment to ensure that the operator will not inhale metal dust. During the cleaning process, argon protection is used to prevent dust explosion.