Metering medium adding device capable of controlling medium adding density

The utility model provides a metering medium adding device capable of controlling medium adding density, and relates to the technical field of coal preparation plant production. The device comprises a box body, and a feeding mechanism, a stirring mechanism and a medium density adjusting device which are arranged on the box body, wherein the feeding mechanism is used for feeding a medium into the box body; the stirring mechanism comprises a high-pressure gas pipeline arranged on the box body, and the high-pressure gas pipeline is communicated with the interior of the box body; the medium density adjusting device comprises a controller, a medium density measuring device and a medium diluting device, the medium density measuring device and the medium diluting device are both arranged on the box body, the medium density measuring device is used for measuring the density of a medium in the box body, the medium diluting device is used for diluting the medium in the box body, and the medium density measuring device