The fused filament fabrication （FFF） technology has become the most popular rapid prototyping technology due to its simple operation， low cost and friendly environment. However， due to the manufacturing process of layer by layer deposition， the quality of its products is difficult to match that of the parts obtained by traditional processing methods. In this paper， for the first time， piezoelectric ceramic and the FFF rapid prototyping equipment are combined to improve the mechanical properties of printed products by using vibration. Firstly， the ordinary FFF rapid prototyping equipment is converted into vibration FFF rapid prototyping equipment by piezoelectric ceramics. Then， the tensile specimens before and after vibration input are prepared and the tensile experiment is completed. By comparing and analyzing the stress-strain relationship of different parts， the influence rule of the applied vibration on the tensile performance of the FFF products is clarified. The results show that vibration can significantly improve the tensile strength and elastic-plastic property of FFF products， and effectively reduce its anisotropy.