Sample introduction disc, sample introduction tower and gas chromatograph

The utility model relates to the technical field of chemical analysis, in particular to a sample introduction disc, a sample introduction tower and a gas chromatograph. A plate rack is arranged on the outer circle of the sample injection plate and is provided with a sample injection position, a sample bottle position and a needle washing position; the needle washing position is provided with a plurality of partition plates in the radial direction, and the partition plates divide the needle washing position into a plurality of fan-shaped needle washing units. A combined bottle is arranged in the fan-shaped needle washing unit; the combined bottle comprises a washing liquid bottle and a waste liquid bottle, and the washing liquid bottle and the waste liquid bottle are combined to form a fan-shaped body matched with the fan-shaped needle washing unit in shape; and bottle mouths of the washing liquid bottle and the waste liquid bottle are arranged on the top surface. The sample introduction disc has the advantage