The invention relates to a 
heating power control circuit and a control method for a resistance heating component. The 
heating power control circuit comprises a filter circuit, a 
rectifier circuit, the resistance heating component, a 
semiconductor power switch, a power supply circuit, a power switch 
control circuit and a main control 
chip which are connected to a mains supply, the input end of the 
rectifier circuit is connected to the output end of the filter circuit, one end of the resistance heating component is connected to the output end of the 
rectifier circuit, the other end of the resistance heating component is connected to the 
semiconductor power switch, the main control 
chip, the 
semiconductor power switch and the power switch control circuit are successively electrically connected, the output end of the rectifier circuit is connected to the power supply circuit, and the power supply circuit supplies the power for the power switch control circuit and the main control 
chip. The mains supply is rectified to be a pulsatile 
direct current through the rectifier circuit, PWM (
Pulse Width Modulation) wave forms generated by the main control chip are used for controlling operations of the power switch, adjusting the 
heating power of the resistance heating component, and controlling the continuous power change of the heating component, therefore, continuous heating of the heating component and continuous 
power output of a product can be achieved.