The utility model relates to the technical field of liquid pipelines, and provides a liquid mixing device which comprises an outer cylinder,
flange plates are fixedly connected to the two ends of the outer cylinder, a short
pipe is fixedly connected to the top of the outer cylinder, a connecting
flange is fixedly connected to the top of the short
pipe, a Venturi inner
pipe is arranged in the outer cylinder, and the Venturi inner pipe is fixedly connected to the connecting
flange. By arranging the short tube, the Venturi inner tube, the circulation hole and other components, when two media horizontally enter through the left side of the outer cylinder and vertically enter through the top of the short tube respectively, and when the horizontally-entering media are subjected to
diameter shrinkage of the Venturi inner tube, the flow speed is increased, the media penetrate through the
diameter shrinkage position at an extremely high speed, and the flow rate is increased. Therefore, the medium entering in the vertical direction enters the inner wall of the outer cylinder, penetrates through the circulating holes in the surface of the Venturi inner tube and is mixed with the medium in the horizontal direction, and the two media are uniformly mixed under the driving of the high flow speed of the medium in the horizontal direction to form the required mixed liquid.