The invention provides a heat processing method of a Bi-2212 superconducting wire/strip material. The method comprises following steps of firstly, placing a Bi-2212 multi-core wire/strip material in a processing furnace; importing oxygen and nitrogen mixed gas or oxygen and argon mixed gas in the processing furnace so as to remove air in the furnace; secondly, continuing to import oxygen and nitrogen mixed gas or oxygen and argon mixed gas; under a condition of constant furnace pressure and oxygen partial pressure, carrying out partial melting heat processing to the Bi-2212 multi-core wire/strip material; and thirdly, stopping importing the oxygen and nitrogen mixed gas or oxygen and argon mixed gas, after removing the gas, obtaining the Bi-2212 superconducting wire/strip material. According to the method provided by the invention, the gas expansion in the Bi-2212 multi-core wire/strip material can be effectively inhibited; the bubbling or defect resulting from the bubbling can be prevented; moreover, the density of the core thread can be improved; and the even Bi-2212 superconducting wire/strip material with high performance can be obtained.