《极限配合与测量技术基础》是中等职业学校机械类专业学生必修的一门重要专业基础课。为了解决本课程教学中老师难教,学生难学的问题,笔者和课题组的同事尝试选用操作性强、拓展性强的典型的机械机构——减速器为对象,采用“以项目为导向,以任务为驱动”的教学方法进行教学,效果明显。本文以《外径千分尺测量工件》为例,探索项目教学法在本课程中的应用。 “Limit with the basis of measurement and measurement technology” is a secondary occupation school machinery major compulsory an important basic course. In order to solve the problem that the teacher is difficult to teach and the students are hard to learn in the teaching of this course, the author and his colleagues in the research group try to choose the typical mechanical mechanism - reducer with strong operability and strong expansibility as the object, adopt “project-oriented , Task-driven ”teaching method of teaching, the effect is obvious. In this paper, “Outer diameter micrometer measuring workpiece” as an example, to explore the project teaching method in the course of application.