Curriculum-based ideological and political education is of great significance to the college moral education. Professional courses are the main position of curriculum-based ideological and political education, and the teaching plan design of professional courses is an important link to ensure the effective implementation of curriculum-based ideological and political education. After studying the characteristics of engineering courses and following the basic rules of teaching plan design, taking the core course of civil engineering-soil mechanics as an example, the overall orientation of the course is considered and refined. It is necessary to integrate appropriate emotional value and other ideological and political teaching objectives into the teaching plan design. In the analysis of the key and difficult points of teaching, it is necessary to think about the method of combining ideological and political content and professional content. In the part of teaching steps and strategies, the breadth, depth, timing and delivery methods of ideological and political content should be designed in detail. The ideological and political part should be included in the teaching schedule. In the part of homework feedback and evaluation, it is a very important step to use professional open questions to guide students to independently construct socialist values.