Print control method and device of thermal printer

The invention discloses a print control method of a thermal printer. The thermal printer is charged through a rechargeable battery. The print control method of the thermal printer includes steps: obtaining temperature of a core of the thermal printer through a temperature sensor before executing printing; obtaining a singe heat count corresponding to the temperature of the core of the thermal printer according to a pre-stored temperature and single heat time count relationship list; controlling the thermal printer to perform the printing according to the obtained singe heat count. The print control method of the thermal printer effectively improves print effects of the thermal printer under low temperature. The invention further discloses a print control device of the thermal printer.