The micro-mechanical behaviors of fiber-concrete complex were investigated,and 3-D nonlinear numerical analyses is perform,in which for the first time the frictional contact on both two contact surfaces is taken into account,and mechanical parameters on contact surface are determined by test.The microscopic stress and strain state in fiber-coating-concrete complex under different loading are presented,which prove the effect of coating on fiber sensing sensitivity and the selection of fiber layout means on mechanical theory.