The invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment with a drip washing device. A closed cavity is arranged inside a cylinder. A filer device is arranged in the middle inside the cavity. The side wall of the cavity is provided with a water inlet and a sludge outlet. The horizontal positions of the water inlet and the sludge outlet are lower than the horizontal position of the filter device. A water-gas separating device is arranged at the upper portion of the cavity and provided with a liquid inlet, a liquid outlet and a gas outlet. A purification device and the drip washing device are arranged outside the cylinder. The drip washing device comprises an ozone pool and a drip washing nozzle connected with the ozone pool through a drip washing solution pipe. The purification device is connected with the liquid outlet through a pipeline and comprises a purification cavity. A plurality of ultrasonic generation devices and an aeration pipeline are arranged inside the purification cavity. The aeration pipeline is connected with an aeration component. The aeration component and an ultrasonic transmitting device are electrically connected with a control device. According to the sewage treatment equipment, the treatment efficiency and the purification efficiency are improved.