3D CAD software has been widely used in machinery, aerospace and other fields. The design based on 3D CAD software has become the trend of engineering design. Guided by the needs of enterprises, this course introduces the use methods and operation skills of 3D software in detail through practical and interesting work tasks and practical training, so that students can master the use methods of 3D software. By displaying the three-dimensional modeling works of domestic vocational college students, students can further understand the current vocational education in China.