An electronic atomization device, comprising: an atomization unit, configured to heat liquid in the electronic atomization device to atomize the liquid; and a control unit comprising a microprocessor configured to send a PWM control signal to the atomization unit, and the PWM control signal is configured to control the atomization unit to heat at a constant temperature kept to a target temperature; wherein the control unit is configured to: calculate an effective output power of the atomization unit; determine whether liquid content of the atomization unit is abnormal according to the effective output power; and control the atomization unit to output a reduced power or stop heating, when it is determined that the liquid content of the atomization unit is abnormal; the electronic atomization device being characterized in that each PWM cycle of the PWM control signal comprises a plurality of power-on phases and power-off phases; the control unit comprises a sampling circuit configured to acquire a heating resistance of the atomization unit in each power-off phase during one preset time cycle; and send the heating resistance to the microprocessor; and the microprocessor is configured to: acquire an output voltage of a power supply of the electronic atomization device in each power-on phase during the preset time cycle, and acquire a duty ratio of the PWM cycle corresponding to a respective output voltage and heating resistance during the preset time cycle; calculate a plurality of effective output powers during the preset time cycle according to each output voltage, each heating resistance and the corresponding duty ratio; and control the atomization unit to output the reduced power or stop heating, if each effective output power is less than a preset power threshold. an atomization unit, configured to heat liquid in the electronic atomization device to atomize the liquid; and a control unit comprising a microprocessor configured to send a PWM control signal to the atomization unit, and the PWM control signal is configured to control the atomization unit to heat at a constant temperature kept to a target temperature; wherein the control unit is configured to: calculate an effective output power of the atomization unit; determine whether liquid content of the atomization unit is abnormal according to the effective output power; and control the atomization unit to output a reduced power or stop heating, when it is determined that the liquid content of the atomization unit is abnormal; the electronic atomization device being characterized in that each PWM cycle of the PWM control signal comprises a plurality of power-on phases and power-off phases; the control unit comprises a sampling circuit configured to acquire a heating resistance of the atomization unit in each power-off phase during one preset time cycle; and send the heating resistance to the microprocessor; and the microprocessor is configured to: acquire an output voltage of a power supply of the electronic atomization device in each power-on phase during the preset time cycle, and acquire a duty ratio of the PWM cycle corresponding to a respective output voltage and heating resistance during the preset time cycle; calculate a plurality of effective output powers during the preset time cycle according to each output voltage, each heating resistance and the corresponding duty ratio; and control the atomization unit to output the reduced power or stop heating, if each effective output power is less than a preset power threshold. calculate an effective output power of the atomization unit; determine whether liquid content of the atomization unit is abnormal according to the effective output power; and control the atomization unit to output a reduced power or stop heating, when it is determined that the liquid content of the atomization unit is abnormal; the electronic atomization device being characterized in that each PWM cycle of the PWM control signal comprises a plurality of power-on phases and power-off phases; the control unit comprises a sampling circuit configured to acquire a heating resistance of the atomization unit in each power-off phase during one preset time cycle; and send the heating resistance to the microprocessor; and the microprocessor is configured to: acquire an output voltage of a power supply of the electronic atomization device in each power-on phase during the preset time cycle, and acquire a duty ratio of the PWM cycle corresponding to a respective output voltage and heating resistance during the preset time cycle; calculate a plurality of effective output powers during the preset time cycle according to each output voltage, each heating resistance and the corresponding duty ratio; and control the atomization unit to output the reduced power or stop heating, if each effective output power is less than a preset power threshold. acquire an output voltage of a power supply of the electronic atomization device in each power-on phase during the preset time cycle, and acquire a duty ratio of the PWM cycle corresponding to a respective output voltage and heating resistance during the preset time cycle; calculate a plurality of effective output powers during the preset time cycle according to each output voltage, each heating resistance and the corresponding duty ratio; and control the atomization unit to output the reduced power or stop heating, if each effective output power is less than a preset power threshold.