The work aims to design a three-dimensional network of carbon (called as 3D framework carbon, 3DFC) as PAO-6 base oil additive to improve the tribological properties and anti-interrupting-oil ability of the base oil. Octadecylamine was used to get oleophilic 3DFCs and 0.001 g 3DFCs powder was added to 10 g PAO base oil to obtain stable and dispersed 3DFCs lubricating oil by ultrasonic dispersion for 30 min. The microstructure and morphology of 3DFCs was analyzed by scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), fourier transform infrared (FTIR) and Raman spectroscopy. The tribological properties of 3DFCs as base oil additive were evaluated by CSM tribometer. The wear spots and scars were characterized by SEM, EDX and Raman spectroscopy. The 3DFCs modified by octadecylamine had higher lipophilicity and could be dispersed steadily in PAO-6 base oil. As PAO-6 base oil additive (0.01wt.%), the wear rate of 3DFCs decreased by an order of magnitude compared with the pure PAO-6 under non anti-interrupting-oil friction test, and but did not fall compared with the 0W-50 engine oil. PAO-6 base oil and 0W-50 engine oil had frictional failure in the anti-interrupting-oil friction test. 3DFCs lubricating oil could maintain smooth and effective friction and its anti-interrupting-oil ability was the best. 3DFCs with advantages of three-dimensional structure, large graphite layer spacing and excellent lubricating properties as additives can significantly improve anti-interrupting-oil ability of PAO-6 base oils and protect friction parts from damage.