Full-automatic NGS library construction system

The invention discloses a full-automatic NGS library construction system. Comprising a shell, a suction pipe arranged in the shell, a suction head arranged below the suction pipe, a pressing structure arranged below the shell, a connecting structure arranged in the shell, located below the shell and used for sealing the suction head, and a cleaning structure arranged in the shell and used for driving the connecting structure and cleaning the suction head. The heating structure is arranged in the shell, is positioned at the uppermost part and is used for providing air for the cleaning structure; by arranging the connecting structure, the sealing effect between the suction head and the suction pipe is improved, so that the shell can more accurately control the suction head to suck a solvent with a specified metering, and the detection accuracy is improved; a heating structure and a cleaning structure are arranged, the sealing effect is further improved, meanwhile, the connecting position of the connecting disc