This textbook is intended for students beginning the study of mechanical engineering design, and used for bilingual (Chinese and English) teaching. The contents of this textbook (Machine Design) include two parts:Mechanism Design,and Design of Mechanical Elements. Mechanism Design may be dividod into three parts. Part 1 is the methods of analysis of mechanism which is composed of an introduction to kinematics and mechanism, and the analysis methods of velocity, acceleration, force, etc.Part 2 is the methodolgy of mechanism design including the basic methodology of mechanism design,the methodology of design of overall scheme,executive system of machine,etc. Part 3 is the detail of design of various mechanisms including planar linkage design, cam design, design of gears and gear trains ,design of intermittent motion mechanism and miscellaneous mechanisms, etc.