Abstract: This topic designed a new test method to fabric drapability performances with the application of computer image processing technology, and evaluated the fabric drape performances in different directions. A fabric drapability performances test device was made. The principle of the test device is that a set platform of fabric drapability performances testing was designed, the fabric was placed on its, and the positive and two sides images of fabric drapability state was obtained with digital cameras. All images were processed with AUTOCAD software, and three indexs of fabric drape coefficient, the maximum length and area ratio of longitude and weft directions were got. So a set of fabric drapability performances comprehensive evaluation method was established, and 30 fabric samples were tested. Under the same conditions, these samples were tested with YG811 fabric drapability tester, and the error of 24 samples test results is not more than 5%. So the testing results of new device and evaluation method is credible.