本文介绍了新开发的“大学物理”在线教学的4 个100%( 学生出勤率100%，认真听课率100%，对学习困难学生帮助率100%，课后微信和微信群答疑率100%) 的教学设计，以及在在线教学中的执行情况. 将2020 年的在线教学与2019 年线下课堂教学对同一难度选择题的课堂测试进行对比，发现在新开发的在线教学设计基础上完成的在线教学，其质量实质等效于或大于线下教学质量. 但缺乏了面对面的师生交流、生生交流，在线教学育人效果还是未知的，有待今后调查研究.

In this paper，teaching designs of a newly developed four 100% online teaching ( 100% student attendance， 100% serious attitude of learning，100% help to students with learning difficulties，100% answer rate of Wechat and Wechat group after class) and its implementation are introduced. Comparing the online teaching in 2020 with the offline teaching in 2019，it is found that the quality of online teaching based on this new online teaching design is equivalent to or greater than that of the offline teaching. However，the lack of face-to-face teacherstudent communication and student communication，the educating effect of online teaching is still unknown，and needs to be investigated in future.