Abstract: Through turning experiment of SiC_P/2024 composite the paper draws conclusion of the effects of tool materials, cutting parameters and SiC_P content on the cutting for ce and tool wear. Moreover, the K-type hardalloy is considered compatible for crude and semi-precise machining, and a smaller cutting speed and larger feed should beadopted. But, the higher content of SiC_P can cause a phenomenon that the axialt hrust force is bigger than the main cutting force, and there is a greater difference value with higher SiCP content. P DC tool is the best tool material for precise machining, and yet with nosuch phenomenonas the above one.