The invention discloses a macadamia nut oil capsule with stable quality and a manufacturing method thereof, and belongs to the technical field of fat health care product processing. The macadamia nut oil capsule comprises a substrate and a capsule shell, wherein the substrate is mainly made of macadamia nut oil, and the substrate comprises, by weight, 45-55 parts of the macadamia nut oil and 2-4 parts of antioxidants. The manufacturing method comprises the working procedures of fat extraction, substrate allocation, capsule shell manufacturing and pelleting drying. Firstly, macadamia nut kernels are dried, pre-heated and cold-pressed, crude fat is obtained, filtering and impurity removal are performed, and finished fat is obtained. The finished fat and the antioxidants are stirred, mixed evenly and degassed. Then, humectants and 6-12.5% of total water are stirred and mixed evenly, film-forming agents and the rest of the total water are added, even stirring and mixing are conducted again, degassing is conducted, and glue solution for the capsule shell is obtained. Finally, the capsule shell is filled with the substrate, and the capsule is shaped and dried. The capsule is full of nutriments, good in health care effect and stable and reliable in quality, the manufacturing method is simple, operation is convenient, process interchangeability is good, and good market promotion value is achieved.