Abstract: To determine the test time of the fabric static drape coefficient in a scientific way,the fabric drape tester XDP-1 was developed,which adopts a drape image test method.Its sample placement in a plate ensures stable lifting while the fabric sample is overhanging because of gravity.The tester can measure many values of the fabric static drape coefficient in a time sequence.Through analyzing the change curves of the fabric static drape coefficient as a function of time,it is considered that the invariable test time of fabric drape is irrational.The minimum test time can be adopted,which improves the rationality and reproducibility of measurements.