This paper studies and analyzes the cracks in the process of cross-rolling piercing production of domestic 825 alloy pipes. Through the use of metallographic observation and finite element analysis methods, the causes of the cracks are discussed, and it is found that the local temperature rise and increased shear stress is the main cause of cracking. In addition, from the perspective of three process parameters such as the initial diameter of the tube, the initial temperature, and the lubrication conditions of the plug, the regularity of the cracking phenomenon of the tube is studied, and the most important factors affecting the local temperature rise of the tube It is the plug lubrication condition, and the local temperature rise phenomenon can be significantly reduced by reducing the friction coefficient of the plug. However, the influence of process parameters on the maximum shear stress is not obvious. Therefore, it is believed that the temperature rise caused by the cross-rolling piercing process is the most critical influencing factor for the quality control of the tube.