The utility model discloses a school circle fixing device of car storage battery line pyrocondensation pipe, including vacuum pump, the fixed mould of school circle and electric cabinet, the vacuum pump is connected with the fixed mould of school circle through the pipeline, is equipped with solenoid valve on the pipeline, and solenoid valve, vacuum pump are connected with the electric cabinet respectively. The beneficial effect of the utility model: simple structure, the preparation is convenient, the dependable performance, the range of application is extensive, has solved the automatic bottleneck problem that the cable is gone into to car storage battery line pyrocondensation pipe box, can the effectual automatic operation that promotes car storage battery line, promoted the machining efficiency of pencil trade, reduced workman's intensity of labour, guaranteed the stability of pencil quality, the utility model discloses the school circle of pyrocondensation pipe has not only been realized to the circular vacuum adsorption device of ingenious adoption, and the adsorption affinity has also played the fixed action to the pyrocondensation pipe simultaneously, has finally realized having accomplished the function of pyrocondensation pipe box income cable and removal through mechanical operation.