Abstract: According to the mutation of fabric resistance when it is wet,we have made an apparatus for testing the anistropic wetting property of the fabric using a metal probe as sensor.This apparatus can simultaneously determine the moisturizing of water along warp,weft and 45° directions of the fabric.The test results reveal that apart from the fabric varieties and weaves,the diffusing rate of water is related to fabric thickness,and the direction of diffusing.There exists a linear relationship between the square of diffusion displacement and the time of diffusion.