Liquid mixing device

The utility model discloses a liquid mixing device, which comprises a mixing tank (3) and at least two liquid storage tanks (9), wherein a mixed liquid outlet (1) is formed in the mixing tank (3). The liquid mixing device is characterized in that a nozzle (4) is arranged in the mixing tank (3); a general connecting pipe (5) and branch connecting pipes (11) are connected with each other and are arranged between the mixing tank (3) and the liquid storage tanks (9); the general connecting pipe (5) is connected with the nozzle (4) in the mixing tank; the branch connecting pipes (11) are connected with the liquid storage tanks (9); a mixing device (6) is arranged on the general connecting pipe (5); and a metering pump (7) and a flow meter (10) are arranged on the branch connecting pipes (11). Compared with the prior art, the liquid mixing device has the characteristics of shortening the mixing time, improving concentration of a mixed solution and the like.