The invention relates to the field of high purity gallium preparation, and discloses equipment and a method for preparing high purity gallium. The invention relates to equipment for preparing high purity gallium. The equipment comprises a closed crystallization tank 1 provided with a cone bottom; the crystallization tank 1 is internally provided with a suction pipe 12 arranged along the axial direction, a circulation hot water pipe 13 surrounding the suction pipe 12, and a first circulation cold water pipe 14 surrounding the circulation hot water pipe 13; the lower end of the suction pipe 12 is close to the conical point of the cone bottom of the crystallization tank 1; and the upper end of the suction pipe 12 stretches out of the crystallization tank 1 upwards. The invention also relates to a method for preparing high purity gallium. With the adoption of the equipment and the method for gallium crystallization, the purity and the yield of gallium can be raised, and the crystallization time can be shortened.