The invention provides a method for improving oxidation resistance of a precision alloy Ni36. The method comprises the following steps: performing working procedures such as electric furnace smelting, AOD (Argon Oxygen Decarburization) refining, LF (Ladle Furnace) refining, continuous casting and plate blank grinding; in the LF refining working procedure, controlling the refining end point to ensure that S is less than or equal to 0.001wt%, and Al is more than or equal to 0.02wt%; then adding one of the following composite additives in percentage by weight: (1) Ti and Zr of which the content range is 0.02-0.10% of Ti and 0.02-0.05% of Zr; (2) rare earth elements Ce and La of which the content range is 0.02-0.1% of Ce and 0.005-0.04% of La; ensuring that Al is more than or equal to 0.02% in percentage by weight in LF furnace refining; ensuring that the content of MnO and FeO in furnace slags is less than or equal to 0.5wt%. The method provided by the invention can be used for ensuring that formed micro particles are uniformly distributed in the alloy by adding the composite additives in a key working procedure of a process route, and can be used for effectively improving the oxidation resistance of the alloy.