The invention discloses an enemator capable of being automatically controlled and an enema method. The enemator comprises a control panel, an electric control air pump, pressure sensors, a liquid medicine box and an enema liquid pipe, wherein the electric control air pump is connected with the control panel through a wire, opening and closing of the electric control air pump can be achieved by operating a control button on the control panel, and an air outlet end of the electric control air pump communicates with the liquid medicine box through an air inlet pipe. The liquid medicine box is ofa sealed structure, a liquid outlet and a liquid adding opening are further formed in the liquid medicine box, the liquid adding opening is sealed during enema, the pressure sensors are further connected to the air inlet pipe or the top of the liquid medicine box, and are connected with the control panel through the wire, the enema liquid pipe is connected to the liquid outlet, one end of the enema liquid pipe stretches into the rectum of a child patient, the other end of the enema liquid pipe stretches into the bottom of the liquid medicine box or communicates to the bottom of the liquid medicine box through an external connection pipe, a pressure relief pipe is branched from the enema liquid pipe, and a normally-open electromagnetic valve is installed on the pressure relief pipe. According to the enemator capable of being automatically controlled and the enema method, automatic control of enema is realized, the time and labor are saved, the safety coefficient is high, and the application prospect is wide.