Printing machine

According to the technical scheme, the printing machine is characterized in that the printing machine comprises a main box body, a conveying belt is arranged in the main box body, an ink box is fixedly installed at the top of the main box body, a pigment spray head is fixedly installed on the side wall face of the inner cavity space of the main box body, and a paint spraying protection assembly is arranged in the main box body and comprises a protection paint box. The protective paint box is fixedly installed on the top of the main box body, two paint conveying holes are formed in the top of the main box body, two paint conveying pipes are fixedly installed on one side of the protective paint box, a protective paint spraying head is fixedly installed on the side wall face of the inner cavity space of the main box body, and the paint conveying pipes penetrate through the paint conveying holes to be fixedly connected with the protective paint spraying head. Transparent protective paint is uniformly sprayed on t