Constant-proportion feeding type dairy cow feeding device

The utility model provides a fixed-proportion feeding type dairy cow feeding device, which belongs to the technical field of animal husbandry, and comprises a feeding box and a fixed-proportion weighing device, one side of the upper end of the feeding box is provided with a feeding port, the lower end of one side of the feeding box is provided with a feeding port, the upper end of the interior of the feeding box is provided with a storage cavity, and the feeding port is provided with a feeding port. A discharging pipe is arranged at the lower end of the storage cavity, and an electric control valve is mounted on the discharging pipe; the constant-proportion weighing device comprises a rotating shaft roller, the rotating shaft roller is rotationally connected with the inner walls of the two sides of the feeding box, one end of the rotating shaft roller is connected with a rotating motor, a mounting plate is mounted on one side of the rotating shaft roller, an electronic weighing machine is mounted on the mount