The utility model provides a forming support mould when in trachea fistula formation of the laryngeal surgery, the utility model can overcome the shortcomings in the prior art, the trachea residual end is implanted during the phase I surgical formation or phase II surgical formation and is fixed in the subcutaneous tissue by using a surgical line as the forming support mould when in fistula formation. The utility model can be left in the human body for a long time or permanently, which can effectively prevent the fistula stenosis. Furthermore, the arc-shaped structure of the arc-shaped fistula formation mould is more in line with the requirements of human physiological function, the patients do not need to use the trachea sleeve, so as to avoid the suffering of wearing the trachea sleeve for a long time, the arc-shaped fistula formation mould is easy to be fixed, and the utility model has no movements, no damage of the tracheal mucosa and no side effects.