Abstract: In order to meet the need of earthquake short-term prediction with geomagnetic non dimensional parameter and multi-comprehensive prediction,we studied geomagnetic non dimensional parameter B_i,j method,and obtained the short-term (3 months)B_i,j tracing image before and after the Tangsan Ms5.6 earthquake on October 6,1995.Based on B_i,j anomalies' time-space evolutionary process and character (number of station,amplitude,the expansion and direction of spatial distribution),we can make trial of earthquake short term prediction.