Adjustable test tube fixing frame

The utility model discloses an adjustable test tube fixing frame and relates to the technical field of chemical experiments. The device comprises a main body assembly and a fixing assembly, wherein the main body assembly comprises a U-shaped frame and a bottom plate arranged on the inner side of the U-shaped frame through a first screw rod; the fixing assembly comprises multiple sets of containing frames movably arranged on the inner side of the U-shaped frame and a second lead screw rotationally arranged at the front end of the U-shaped frame. Through the arrangement of the main body assembly, the bottom plate is driven by the first screw rod to move, so that the test tube is driven by the bottom plate to move, the problem that the test tube is inconvenient to take out in the prior art is solved, through the arrangement of the fixing assembly, the placing frame is driven by the second screw rod to move, and the test tube is fixed by the placing frame; the problem that test tubes with different lengths are in