The present invention provides an automatically drinking device for pets, which includes a water storage tank with an opening, a drinking water tray arranged on the opening of the water storage tank, and a pump with lamp fixed in the water storage tank； the top face of the drinking water tray is depressed down to form a sink, the sink is provided with a spray jet which is connected with the outlet of the pump with lamp through a water pipe； the lower end of the drinking water tray is provided with a water filtering structure in the water storage tank； the water filtering structure comprises a filtering plate, a filtering box contained in the filtering plate and a nylon net arranged between the filtering plate and the filtering box, which has the advantages of simple structure, diverse functions and low processing cost.
