Extensive research has been done on the static properties of steel fiber reinforced concrete(SFRC),but less on its dynamic properties.The dynamic properties of SFRC are influenced by the properties(geometry and strength) of steel fiber,the fiber contents,the fiber distribution,the performance of the matrix concrete.For the study’s convenience,by use of a simplified model of fine-long-pole,the basic differential equations for the deformation/movement of coarse-short steel fiber are derived.The emphasis is given on study of the intestinal stress distribution of mass coarse-short steel fiber reinforced concrete structure under dynamic loading.