Abstract: The present disclosure provides a pet drinking device, including a support base, a water storage container, a cover member, a water injection channel, a water return channel, a water drinking disc, a water pumping device, and an electric control unit. A first accommodation cavity and an accommodation space having at least one opening on one side of the first accommodation cavity are formed on the support base. The water storage container is capable of being take out or placed into the accommodation space from the at least one opening. The cover member is formed above the support base to enclose the first accommodation cavity and cover the accommodation space. The water injection channel is formed on the cover member and/or the support base and communicated with the first accommodation cavity.