The P(VDFTrFE) piezoelectric fiber (polyvinylidene fluoride and trifluoroethylene copolymer) was prepared by using the method of nearfield electrostatic spinning and the effects of different processing parameters on the diameter and morphology of the fibers were studied.The results show that the processing parameters of nearfield electrostatic spinning play an important role in the morphology of fibers;especially the concentration of P(VDFTrFE) electric spinning solution has a significant influence on the formation of fibers.The insufficiency of volatilization rate in the process of droplets falling will result in fiber forming failure when the P(VDFTrFE) electric spinning solution concentration is lower than 12%.Within a suitable driving voltage range,the larger the applied voltage is,the finer the fiber diameter.Also, the faster the collector moves,the finer the diameter of the fiber.The diameter of P(VDFTrFE) fiber prepared by the nearfield electrostatic spinning is up to （0.7~12） μm.In addition, according to the piezoelectric properties of P(VDFTrFE) itself,a certain flexural deformation of the fiber is treated to test the polarization of the P(VDFTrFE) fibers prepared by the electric spinning process.The experimental results show that the P(VDFTrFE) fiber prepared in situ cannot show obvious piezoelectricity.