Control method of printing machine and printing machine

The invention discloses a control method of a printing machine and the printing machine, wherein the control method of the printing machine comprises the following steps that a first group of heating units of a printing head are controlled to output first printing energy for forming printing points at the first concentration on a printing medium; a second group of heating units of the printing head are controlled for continuously outputting second printing energy for forming printing points at second concentration on the printing medium, wherein the second group of heating units consist of heating units requiring printing energy compensation in the first group of heating units. Through the control method and the printing machine provided by the invention, the printing concentration of the heating units requiring the printing energy compensation on the corresponding printing points is improved, and the problem of nonuniform printing concentration of each printing point caused by nonuniform pressure between the printing head and a printing rubber roller can be effectively solved.