Combined fluorescent quantitative PCR (Polymerase Chain Reaction) plate

The utility model relates to a combined fluorescent quantitative PCR (Polymerase Chain Reaction) plate which comprises a tube placing mechanism and a loading assembly, the tube placing mechanism comprises a combined frame and a loading assembly, the combined frame comprises supporting parts which are diagonally and symmetrically arranged and extending parts which are arranged on the supporting parts, one ends, far away from the supporting parts, of the extending parts extend to the supporting parts on the opposite sides, and the loading assembly is arranged on the supporting parts on the opposite sides. The loading assembly is arranged on the supporting part and used for loading a reaction tube, the fixing assembly is used for bearing the supporting part, and the supporting part is matched with the extending part, so that the extending part can be folded or unfolded along the supporting part and slides on the supporting part along the fixing assembly, and the mounting size of the loading assembly is confirmed