Test tube rack for strain culture and preservation

The utility model provides a strain culture and preservation test tube rack which comprises a placing seat, four corners of the top of the placing seat are fixedly connected with supporting rods, the tops of the supporting rods are fixedly connected with a top plate, the top of the top plate is provided with a plurality of evenly distributed placing grooves, and clamping mechanisms are arranged in the placing grooves. According to the test tube rack disclosed by the utility model, through the arrangement of the clamping mechanisms, when test tube main bodies of different types and different specifications are cultured and preserved in the test tube rack by experimenters, the test tube main bodies are inserted into the placing grooves, and the test tube main bodies are placed in the placing grooves under the extrusion action of the test tube main bodies; the clamping arc-shaped plates move towards the two sides, so that the distance between the clamping arc-shaped plates is increased; meanwhile, the test tube