The invention discloses a nylon 66 material for a bearing cage and a manufacturing method thereof. The method comprises the following steps: mixing and calcining sepiolite powder, boron nitride and manganese silicide, and subjecting a calcined material to crushing and sieving to obtain a powdery auxiliary agent; mixing nylon 66, ceramic fibers, vinyl triethoxysilane, the powdery auxiliary agent, nanocarbon, diphenyl-p-phenylenediamine, 4-hydroxyoctadecylanilide and polyacrylamide to obtain a mixture; and subjecting the mixture to hot pressing to obtain the nylon 66 material for the bearing cage. The nylon 66 material for the bearing cage in the invention has the characteristics of self-lubricating performance, high wear resistance and high hardness.