Abstract: A series of poly(lactic acid) (PLA)/poly(ether sulfone) (PES) composite nanofiber membranes were prepared by coaxial electrospinning with different extrusion rates of skin solution and different types of nano?sized additives including graphene、carbon nanotubes and halloysite in the core solution. The morphology, mechanical properties, hydrophobicity and oil absorption ratio of the obtained membranes were analyzed by means of scanning electron microscopy, universal testing machine, and contact angle and oil absorption measurements. The results indicated that all of the nanofiber membranes had a contact angle greater than 130 ° and exhibited the oleophilic and hydrophobic characteristics. The nanofiber membranes gained the optimum oil absorption and tensile properties when graphene oxide was introduced as a core additive. The nanofiber membranes achieved an oil absorption rate of 67.61 g/g in glycerin and 8.02 g/g in edible oil, the longitudinal breaking strength of 62.68 MPa, the transverse breaking strength of 43.98 MPa, and the transverse elongation at break of 697.66 %.