Abstract: In order to effectively prevent low mining rate, mining and driving connection contradiction and other problems occurred when the fully mechanized top C oal caving mining face passing through ultra large fault, the geological exploration technology was applied to investigate the certain position of the fault.With the econo mic and technical comparison between the cross over passing fault plan and the direct passing through fault plan, based on the direct passing through fault method, the layer level adjustment, powered support protection, coal shearer improvement and other technical measures were provided and applied.The practice results showed tha t with the improvement, the direct passing through fault technology could ensure the fully mechanized top coal caving mining face successfully passing through the ultra large fault and the recovered coal was up to 1.264 million t.