Heating control method and device, and atomizer

A heating control method, applied to an atomizer having at least an aerosol-forming substrate and a heating assembly, the heating assembly being configured to heat the aerosol-forming substrate located in a region to be heated, a total length of the aerosol-forming substrate being greater than a length of the region to be heated, the method comprising:

• controlling, in response to a puff trigger signal, the heating assembly to heat up to a target temperature range, and controlling the aerosol-forming substrate to move toward the region to be heated by a first target length, the aerosol-forming substrate in the region to be heated being atomized within the target temperature range so as to form aerosol;
• and
• controlling, after a preset condition is satisfied, the heating assembly to cool down to below the target temperature range, and controlling the aerosol-forming substrate to continue to move toward the region to be heated by a second target length,
• wherein the first target length and the second target length are each approximately equal to the length of the region to be heated.