Nucleic acid detector with channel number adjusting function

The utility model discloses a nucleic acid detector with the function of adjusting the number of channels, and particularly relates to the technical field of nucleic acid detectors, the nucleic acid detector comprises a detector shell and a test tube, a sliding plate is slidably mounted on the inner wall of the detector shell, and a first bearing plate and a second bearing plate are slidably mounted in an inner cavity of the sliding plate; a communicating plate is fixedly mounted on the outer wall of the first bearing plate, a mounting plate is fixedly mounted on the outer wall of the second bearing plate, and a hydraulic cylinder is fixedly mounted in an inner cavity of the first bearing plate. The slidable sliding plate is arranged in the inner cavity of the detector shell, the communicating plates and the mounting plates are slidably mounted in the inner cavity of the sliding plate, the hydraulic cylinders are fixedly mounted on the inner walls of the communicating plates, the inner cavities of the communi