The invention provides a combustion method of a catalysis-assisting combustion chamber. According to the combustion method, propane is adopted as a fuel. The market price of the propane is lower thanthe market price of a liquefied gas, a heat value of the propane is higher than a heat value of the liquefied gas, and the propane replaces the liquefied gas so as to be used as a fuel of the assisting combustion chamber, so that not only can the heating demand of the process be met, but also the effects on saving energy, reducing consumption, and reducing the combustion cost after extracting a high-value-added product are achieved. According to the combustion method of the catalysis-assisting combustion chamber provided by the invention, the fuel required for a conventional catalysis-assisting combustion chamber is replaced with the low-value-added fuel with a high heat value and low cost, and the propane is used as the fuel for the catalysis-assisting combustion chamber so as to be combusted through controlling various combustion process conditions during a combusting process of the catalysis-assisting combustion chamber. According to the combustion method of the catalysis-assistingcombustion chamber provided by the invention, the propane replaces combusting oil, so that the risks that the equipment performance and the service life are influenced by overheat of the assisting combustion chamber are reduced.