Abstract:There are various factors that influence the processing surface quality during turning processing. Its a good way to analyze the influence of surface quality on product performance and adopt corresponding measures to get ideal processing surface quality. Among all the factors that influence the processing surface quality, cutting blade is one of the keys. The performance characteristics of fillet radius of cutting blade were discussed. The different processing results, problems and their reasons caused by fillet radius of cutting blade were studied. Finally,by actual experiments, some suggestions on how to select the fillet radius of cutting blade were put forward for reference.