The invention provides a temperature-sensitive printing assembly and an electrocardiogram device. A pivot shaft, a hinging seat and a torsion spring are arranged, when a rubber roll is filled, the rubber roll jacks up a temperature-sensitive print head, the torsion spring is deformed to compress the temperature-sensitive print head and the rubber roll, and in the process, the rubber roll does notextrude the temperature-sensitive print head laterally and the temperature-sensitive print head is prevented from causing unsharpness and inconsistency of printing; a screw is arranged, the lateral position of the temperature-sensitive print head can be adjusted manually, possible displacement can be calibrated timely, and the printing precision is improved; an elastic connection sheet is arranged, and the adjusting precision of the screw is improved in an elastic adjustment manner; and a touch screen and a touch control pen are arranged to provide convenience for operation and control.