The invention discloses a coating data processing method, device and a computer readable storage medium. The coating data processing method comprises the steps that printing data are obtained in the coating mode; then splicing data are extracted from the printing data; and finally spray-printing data are generated according to basic parameters and the splicing data. The coating data generation scheme high in execution efficiency and low in bandwidth occupation is achieved. Firstly, the data channel pressure of a control chip is relieved; and secondly, the data transmission time is reduced, meanwhile, the printing efficiency is improved, and printing power consumption is reduced.