Abstract: A new drape tester,ZYF-3 fabric-drape three-dimensional tester,is introduced.The instrument is an integration of optical,mechanical and electronic.It uses the method of annular structure light as the test principle.Firstly,the annular structure light is generated by the paraboloid and the raster;then,by using the Charge Coupled Device(CCD) lens,the light and shade alternating contour stripes formed on the surface of fabric are obtained;and finally,the software system realizes the contour stripes and the edge of fabric recognition,and completes the data processing.It not only can obtain each evaluation indicator that express fabric drapability,but also realizes the simulation and reconstruction of fabric 3D drape shape.It provides a new method for fabric drapability appraise and for further study.