Sampling port needle head sealer for bioreactor

The utility model provides a sampling port needle head sealer for a bioreactor. The sampling port needle head sealer for the bioreactor consists of a right end cover, a barrel body, a connecting cover, a sealing cover and a rubber cushion, wherein one end of the barrel body is connected with the right end cover and the rubber cushion by threads; a needle hole is formed in the middle part of the right end cover; the other end of the barrel body is connected with the rubber cushion and the connecting cover by threads; a middle hole through which a needle head penetrates is formed on the middle part of the connecting cover; the sealing cover is buckled at the other end of the connecting cover by the rubber cushion to form an enclosed barrel body structure. Before and after sampling by adopting the enclosed barrel body structure, the needle head is arranged in the enclosed barrel body; even though the needle head has residual liquid during a pulling-out process after sampling, the residual liquid only can be seal