Biological centrifuge

The utility model discloses a biological centrifugal machine which comprises a centrifugal machine body, one side of the vertical end of the centrifugal machine body is fixedly connected with an outer frame, the inner surface wall of the outer frame is connected with a frame door in a sliding mode through a groove, and a limiting mechanism for preventing the frame door from disengaging from the groove is arranged between the outer frame and the frame door. When the test tube rack is used, the frame door is pulled towards one side of the outer frame, the rotating disc is pulled to drive the connecting rod to move until the connecting rod is separated from the round hole in the supporting frame, the supporting frame is pulled open, the supporting frame drives the placing frame to be opened until the placing frame is parallel to the ground and the supporting frame is perpendicular to the ground, and then test tubes can be placed on the placing frame. The abutting gaskets are arranged on the placement frame, test