The invention discloses a capsule filling machine. The machine comprises a shell and a feeding hole, wherein an ultraviolet lamp tube is arranged in the middle end at the top of the cavity of the shell, and a temperature sensor is arranged at the left end of the outer surface of the ultraviolet lamp tube; a driven wheel is arranged at the left lower end of the inner cavity of the shell, and is in transmission connection with a driving wheel by virtue of a conveying belt; a capsule filling shell is arranged on the upper surface of the conveying belt; the driving wheel is in transmission connection with a motor by virtue of a belt; the motor is arranged on the upper surface of a supporting plate; the supporting plate is arranged at the bottom of the right side of the outer surface of the shell; a drawer is arranged at the bottom of the inner cavity of the shell; a handle is arranged at the middle end of the outer surface of the drawer; supporting legs are arranged at the bottom of the outer surface of the shell; rollers are arranged at the bottoms of the outer surfaces of the supporting legs. The capsule filling machine can be used for disinfecting and sterilizing air in the shell due to the arrangement of the ultraviolet lamp tube, ensures clean and sanitation in the capsule filling process, and is beneficial to body health of taking persons.