The book, based on the vocational training objectives and teaching characteristics, is compiled according to the national latest standards for mechanical drawing and technical drawing. It contains basic mapping knowledge and skills, orthographic projection and three-view drawing, the basic three-dimensional view, the basic three-dimensional axonometric diagram, assembly, the basic representation of mechanical parts, part drawings, assembly drawings, computer graphics, etc. The book can be used by vocational colleges, technical schools and technician colleges as a teaching material for machinery, numerical control, electromechanical equipment, automobiles, equipment and other subjects and can also be used as a self-study book or a reference book for engineering technicians.