Liquid feed additive sealing device and method with sterilization function

The invention discloses a liquid feed additive sealing device and method with a sterilization function, and relates to the technical field of sealing equipment. Comprising a shell, a conveying belt is installed on the lower portion of the shell, a first electric push rod is installed on the upper side in the shell, a first electric sliding rail is fixedly connected to the telescopic end of the first electric push rod, a first support is fixedly connected to a sliding block on the first electric sliding rail, and longitudinal sliding rods which are symmetrically distributed are rotationally connected to the first support; the first electric sliding rail is provided with a second electric sliding rail, a sliding block on the second electric sliding rail is fixedly connected with a second support, the second support is rotationally connected with symmetrically-distributed transverse sliding rods, and the longitudinal sliding rod and the adjacent transverse sliding rods are jointly and slidably connected with a s