Abstract: To find the cracking causes of 0Cr13 ferrite stainless steel wire during die pressing, chemical composition, microstructure, cracking morphology and inclusions distribution were analyzed. The results show that the chemical composition of the stainless steel wire was abnormal, and the carbon content was relative high and the content of chromium and manganese were relative low. Quantities of carbides and inclusions with gathering distribution existed in the stainless steel wire, the size of dark gray granular carbides was 0.3-0.8 μm, the size of inclusions was 15-25 μm, and the main inclusions were oxides, calcium-magnesium carbonate and silicate. Severe plastic deformation appeared in the stainless steel wire before die pressing, carbides piled up at grain boundaries, microstructure was inhomogeneous, and stress construction existed at the junction of inclusions and the substrate. During die pressuring, plastic instability happened, cracks originated from the stress concentration area caused by inclusions, and then expanded to interior and eventually resulted in the stainless steel wire cracking.