This book is written in accordance with the basic requirements of the National Vocational Standard for Intermediate Lathe Workers, and strives to embody the spirit of "employment-oriented, ability-oriented", combine the requirements of vocational skill appraisal and double certificates in secondary vocational schools, streamline and integrate theoretical courses, and pay attention to practical teaching. The main contents of this book include lathe operation training, turning basic training, turning outer groove and cutting, turning step shaft, machining inner hole, turning inner groove, turning conical surface, turning forming surface and knurling, machining common thread, turning trapezoidal thread and worm, and turning special structural parts. This book adopts the concept of project-based teaching to organize the content, and each project contains a relatively independent teaching theme and focus. Starting from putting forward the training tasks and requirements, set the training content, and highlight the cultivation of technical essentials and operational skills. This book strives to integrate theory with practice in content, with pictures and texts, intuitive images and concise and easy-to-understand text narration. This book can be used as a teaching book for related majors in vocational colleges, and can also be used as a reference for related professional and technical personnel.