Microfluidic chip, detection system and device used for rapid DNA detection

The present invention discloses a microfluidic chip for rapid DNA detection, and the chip includes a liquid storage unit, a nucleic acid extraction unit, an amplification and detection unit and a fluid control unit. The present invention further discloses a system and a device comprising the microfluidic chip for rapid DNA detection. The microfluidic chip can achieve repeated and automated nucleic acid extraction and fast and efficient PCR amplification and real-time fluorescence detection. At the same time, by use of a disc array structure, a plurality of samples can be analyzed in parallel, so that the method is expected to be used in scientific research and clinical body fluid sample DNA rapid detection.