An energy-saving and environmentally-friendly mold of a driving belt comprises a cylindrical outer cylinder wall, and a cylindrical inner cylinder wall is arranged in the outer cylinder wall. The inner cylinder wall is matched with an upper-side end cover plate and a lower-side end cover plate to form a sealing cavity; an annular steam channel is arranged between the outer cylinder wall and the inner cylinder wall, and vent holes are arranged in the upper-side end cover plate and the lower-side end cover plate corresponding to the annular steam channel; and insulating layers are arranged on the inner cylinder wall and the end cover plates with sealing performance at the upper side and the lower side, and arranged on the wall body at the inner side of the inner cylinder wall and the wall bodies at the inner side walls of the end cover plates with sealing performance at the upper side and the lower side. The energy-saving and environmentally-friendly mold of the driving belt has simple structure and practical functions, is energy-saving and environmentally-friendly, reduces production cost, avoids waste, and improves the utilization ratio of saturated steam.