The invention discloses a label printing machine capable of saving energy. The label printing machine comprises a label printing machine body, and the label printing machine further comprises roller assemblies, an oven body, an upper air suction pipe and a lower air suction pipe, a pre-heated upper air blowing pipe and a pre-heated lower air blowing pipe and a blower, wherein the roller assembliesis fixed between a printing assembly and a material receiving assembly; the oven body is provided with an oven inlet and an oven outlet, the plurality of roller assemblies are positioned in the ovenbox, the label output from the printing assembly is input from the oven inlet, and the label is conveyed from the oven outlet to the material receiving assembly after being conveyed through the plurality of roller assemblies; the upper air suction pipe and the lower air suction pipe are installed close to the oven outlet; the pre-heated upper air blowing pipe and the pre-heated lower air blowing pipe mounted are mounted prior to the printing assembly; and an air blowing inlet of the blower is communicated with air outlets of the upper air suction pipe and the lower air suction pipe through a pipeline, an air blowing outlet of the blower communicates with an air inlet pipe opening of the pre-heated upper air blowing pipe and an air inlet pipe opening of the pre-heated lower air blowing pipethrough the pipeline, and the blower can convey the heat energy absorbed on the label at the oven outlet to the label before the printing assembly. The label printing machine has the beneficial effects that the structure is reasonable, the energy is saved, and the printing speed is improved.