Biological culture extraction device

The utility model relates to the technical field of biological culture extraction, and discloses a biological culture extraction device which comprises a placing bottom plate, supporting plates are fixedly mounted on the front surface and the back surface of the top fixing part of the placing bottom plate, and a positioning box is rotatably connected between the two supporting plates. According tothe utility model, the two positioning springs are installed at the temporal part of the culture tube placing groove, and the culture tube clamping blocks are installed at the opposite sides of the two positioning springs, so that the culture tube can be well installed and clamped, the culture tube is not easy to disengage during rotation, and the culture tube is not easy to fall off by installing the positioning plate at the top of the placing bottom plate. The positioning plate is in threaded connection with a threaded rod, and the left side of the threaded rod is hinged to the bottom of the right side of the posit