The present invention discloses an ultrasonic dirt-removing and automatic-sorting device for fruits and belongs to the technical field of food processing. The device comprises an automatic material feeding machine. A pair of weighing plates are arranged in the automatic material feeding machine, a falling buffer device is arranged below the weighing plates, a first conveyor belt is arranged at a material outlet under the automatic material feeding machine, a material outlet end of the first conveyor belt is provided with a dirt-removing tank, a raw material basket with a bottom part of a certain distance from a bottom part of the dirt-removing tank is characteristically arranged in the dirt-removing tank, a tube-type spiral lifting machine with a pending lower end extends into the raw material basket, a spiral plate is arranged in the tube-type spiral lifting machine along an axial direction, a second conveyor belt is arranged at an upper end of the tube-type spiral lifting machine, and an automatic sorting machine is arranged at a right side of the second conveyor belt. The device is short in raw material washing time and good in washing effects, and can improve production efficiency and product quality.