The embodiment of the invention provides a control circuit and a dehumidifier, and relates to the technical field of electrical control. The control circuit includes a fan control unit, a compressor control unit and a power-on self-starting unit, the power-on self-starting unit includes a first coil and a first contactor, the first coil is in parallel connection with a power supply, the first contactor is electrically connected with the fan control unit, the fan control unit is electrically connected with the compressor control unit and a fan, the compressor control unit is electrically connected with a compressor, and the fan control unit and the compressor control unit are electrically connected with the power supply. The first coil is used for controlling closing of the first contactorwhen the dehumidifier is powered on, and then the fan control unit is controlled to conduct, so that operation of the fan is controlled. At the same time, the fan control unit controls the compressorcontrol unit to conduct, and operation of the compressor is conveniently controlled. The dehumidifier has the power-on self-starting function, and the labor intensity of an operator is effectively reduced.