The invention discloses an automatic collection device for waste water in a B-mode ultrasound room. The automatic collection device comprises a first strip-shaped bearing base, a strip-shaped bearing box is fixedly connected to the upper surface of the first strip-shaped bearing base, an extrusion mechanism is arranged on the upper surface of the interior of the strip-shaped bearing box, and a feeding mechanism is arranged on the front surface of the upper end of the strip-shaped bearing box; and a pushing discharging mechanism is arranged at the lower end of the back surface of the interior of the first strip-shaped bearing base, a movement mechanism is arranged on the lower surface of the first strip-shaped bearing base, and a horizontal movement mechanism is arranged at the center of the front surface of the strip-shaped bearing box. The automatic collection device has the beneficial effects that operation is relatively convenient, collection is smooth, discharging is convenient, the hand is prevented from being in direct contact with garbage, storage space is saved, protection on parts is good, movement is convenient, and the automatic collection device is a device suitable for putting by crowds with different conditions.