DNA (deoxyribonucleic acid) concentrating and filtering device

The utility model relates to the technical field of biomedical engineering, and discloses a DNA (deoxyribonucleic acid) concentrating and filtering device which comprises a base, a cross rod I, a sleeve, a strip-shaped through hole, a strip-shaped opening, a vertical rod, a cross rod II, an annular clamp, an air pipe, a piston, a push rod, an annular baffle I, a rubber pad I, an air outlet pipe, a test tube rack, a rubber pad II, a round through hole, a filtering pipe, an annular baffle II and a filtering net. According to the utility model, the piston in the air pipe moves downwards to pressurize the filter pipes, so that the time required by one-time filtering is shortened, the three air outlet pipes are arranged at the bottom of the air pipe and respectively extend into the three filter pipes, and the filter pipes are tightly propped against the bottom of the air pipe through the test tube rack, so that the three filter pipes are pressurized at the same time; and the experiment efficiency is greatly improv