Abstract: Disclosed are a method and a device for power allocation in a carbon dioxide incubator, and a carbon dioxide incubator. The method for power allocation in a carbon dioxide incubator provided with heating wires on multiple inner surfaces of the carbon dioxide incubator includes: according to a current temperature and a target temperature of a box body of the carbon dioxide incubator, determining a power index; in case where the current temperature is less than or equal to the target temperature, according to the power index, determining a heating strategy for each inner surface of the carbon dioxide incubator by looking up a table; and according to the heating strategy for each inner surface, adjusting at least one or more of the power and/or the start-stop time of the heating wires on each inner surface.