Abstract: Phenolphalein Polyetherketone（PEK-C）ultra-fine non-woven fabric-films was prepared by electrospinning in the solvent of DMF.The micro morphologies and tensile properties of the films were investigated by SEM and constant rate of extension testing machine (CRE). Besides,from the process, conditions of surroundings and parameters of the machine have been investigated in this paper,which may influence the morphologies of PEK-C ultra-fine fibers. The results indicated that temperature,humidity,and concentration of the solution are the decisive factors in spining,and free-defect ultra-fine fiber could be produced in suitable condition.The diameter of ultra-fine fiber mainly range from 300 to 600 nm,and the breaking strength range from 0.35-0.39N•m2/g.