We use the morphological analysis method to analysis borehole strains' data in mid-range of the Tianshan Mountains. The results indicate that there are 5 borehole strains with anomalies in the total 9 borehole strains before this earthquake, which include 2 short-term anomalies and 3 impending anomalies. The anomaly characteristics are of tensin-compress feature, faster compression rate, high frequency information and regular pulse and periodic steps. If two or several borehole strains had anomalies at the same time, we should then pay more attention to the overlap area of maximum strain direction.