Constant-temperature printing device

The utility model discloses a constant-temperature printing device, which belongs to the technical field of ink jet printing and comprises a working base plate, a working table is arranged on the working base plate, a material storage box used for storing coating is arranged on the working table, and the material storage box is communicated with a material brushing box through a feeding hopper at the bottom end of the material storage box. A screen used for filtering coating is movably installed in the material brushing box, printing bristles are arranged at a discharging opening of the material brushing box, and slidable driving plates are arranged on the two sides of the material brushing box. On one hand, paint which is not subjected to printing work in the material storage box is heated to keep constant temperature, and on the other hand, the temperature of the paint moving from the material brushing box to the surface area of the printing cylinder is changed in the mode that cold air or hot air is spraye