The invention relates to a production process of a multi-element hot fluid used for thickened oil storage and a thermal recover process of the multi-element hot fluid. The production process of the multi-element hot fluid comprises the steps of pressurizing and separating air to obtain high-purity nitrogen and oxygen-enriched air; pressurizing the obtained oxygen-enriched air to generate a part of the multi-element hot fluid; and mixing the generated part of multi-element hot fluid with the obtained high-purity nitrogen. The production process of the multi-element hot fluid has the advantage that components are adjustable, multi-element hot fluids with different components can be designed according to different oil storage characteristics, and the application range of the thermal recovery process of the multi-element hot fluid is widened.