Test tube clamp suitable for thermostat water bath

The utility model discloses a test tube clamp suitable for a constant-temperature water bath kettle. The fixing device comprises a fixing plate, a plurality of fixing holes are evenly distributed in the fixing plate, a plurality of soft fixing protrusions are arranged on the inner side walls of the fixing holes in a protruding mode, a handle rod is fixedly connected to the front edge of the fixingplate, the rear end of the handle rod is fixedly connected with the front edge of the fixing plate, and a clamping mechanism capable of being clamped on the edge of the constant-temperature water bath kettle is arranged on the rear portion. A single test tube is clamped and fixed through a plurality of soft fixing bulges; the condition that the reagent is overturned due to upward floating of thetest tube during boiling water bath heating is avoided; meanwhile, the plurality of fixing holes can correspond to a plurality of test tubes; relative positions of a plurality of test tubes are kept,test tube breakage caused b