In　order　to　study　the　conformation　form　of　the　typical　faults-the　distortion　damage　characteristic　of　en-echelon　faults,　the　paper　uses　the　eighth　fracture　rule　of　the　finite　element　program　of　the　tension　fracture.　When　0.995σ　max≤　σ　1≤　σ　max,　the　node　cracks,　the　fracture　process　of　the　en-echelon　faults　is　simulated.　The　en-echelon　faults　is　divided　into　extrusion　type　and　tension　type　according　to　the　relation　between　staggered　direction　and　movement　direction.　The　fracture　processes　of　these　two　kinds　fault　structures　and　comparison　is　made　of　the　experiment　results　of　the　digital　speckle　experiment　with　the　field　experiment　of　the　rock　sample.　The　numerical　experiment　simulates　the　second　crack,　that　is,　the　crack　of　the　tension　fracture.　This　can　provide　the　theory　support　for　the　study　on　the　occurrence　mechanism　and　warning　signs　of　the　earthquake.