Spliced PCR (Polymerase Chain Reaction) tube

The utility model discloses a spliced PCR tube, and relates to the technical field of test tubes for detection, the spliced PCR tube comprises a PCR tube row formed by longitudinally connecting a plurality of PCR tubes, the top of the PCR tube row is provided with a detachable end cover, two sides of each PCR tube are respectively provided with a first extension block and a second extension block, the first extension block of any PCR tube and the second extension block of the adjacent PCR tube are transversely buckled into a whole, and the first extension block of any PCR tube and the second extension block of the adjacent PCR tube are buckled into a whole. Each PCR tube row is longitudinally buckled into a whole through a parallel row, a convex point-shaped buckling structure is arranged between each first extension block and each second extension block, the tail ends of convex points also act on the parallel rows, adjacent PCR tubes are spliced through wedge-shaped grooves and wedge-shaped bulges, and verti