The invention discloses a method for measuring soil water content based on ultra wide band signal and non-singleton fuzzy logic system and relates to a method for measuring the soil water content. The invention aims at solving the problems of time cost, calculation cost and identifying correction rate.The method comprises the following steps: step 1, collecting a radar echo signal with different soil water contents, step 2, cutting out the part withless noise influence in the radar echo signal, serially connecting the radar echo signal with same water content to form a group of echo signal series,solving the average value of multiple groups of echo signals to be used as the real soil echo signal serious in signal prediction; step 3, predicating the soil echo signal by the non-singleton fuzzy logic system, extracting a radar echo template; step 4, comparing the radar echo template with the echo signal of unknown soil water content collected by the same wide band; finally, classifying the unknown soil water content signal into the corresponding minimum root-mean-square error template, and then obtaining the soil water content of the testing signal.