The present disclosure provides an electric cleaning brush including a housing, a brush body, a driving component, and an adapter. The brush body includes a brush rod provided with a connected liquid outlet channel and a liquid outlet. The driving component includes a power device and an output shaft, the output shaft is provided with an axial channel, and connected to the power device and the brush rod. The axial channel is connected to the liquid outlet channel. The adapter is fixedly arranged within the housing and has a liquid storage chamber. The output shaft is rotatably connected to the adapter and is provided with lateral channels. The lateral channels are connected to the axial channel and the liquid storage chamber, which is connected to the cleaning bottle. The present disclosure can automatically clean the bottle and the cleaning liquid can be automatically guided out of the brush rod.