Molecular diagnosis instrument and PCR amplification detection system thereof

The utility model discloses a molecular diagnostic instrument and a PCR (Polymerase Chain Reaction) amplification detection system thereof, and the PCR amplification detection system comprises a heating block, a heating sheet for heating the heating block, a radiator for radiating the heating sheet, an amplification cover for covering the heating block and a cooling device for improving the radiating efficiency of the radiator, the heating block is provided with at least two reagent holes for placing nucleic acid samples, and the amplification cover, the heating block, the heating sheet and the radiator are sequentially arranged from top to bottom. A single heating block of the device is provided with a plurality of reagent holes, and the heating temperature of each heating block is consistent, so that the same amplification condition of the same nucleic acid sample can be ensured, and the deviation influence on the amplification result of the sample is avoided. Moreover, the cooling device can effectively im