Abstract: The tensile properties and fracture behavior of low alloy wear-resistant steels were studied by tensile experiments at different strain rates. The results show that with the increase of strain rate, the tensile strength and yield strength of the test steel gradually increase, and the elongation decreases gradually. The fracture morphology, microstructure and inclusions near the fracture surface were studied by scanning electron microscopy（SEM）. The results show that with the increase of strain rate, the average dimple size of the fracture gradually increases, and the area of the decomposition surface in the same statistical plane gradually increases. In the same field of view, there are two kinds of microstructure, lath and grain,which are smooth along the strip, rough along the full precipitation area of carbide, and larger deflection appears at the junction of the two microstructure. Two major inclusions appear, the N-rich Ti（C, N） inclusions are regular polygonal, and the C-rich Ti（C, N） is in long strip irregular form,which distribute along the rolling direction. Both kinds of inclusions lead to the partial weakening of the material and reduce the strength and plasticity of the material.