The web-based PBL teaching plan in pediatrics embodies the network learning en-vironment and learning requirements. The basic design unit is a complete real case with certain width and depth， which can stimulate the students' interests of participation and guide students into a pre-determined learning area to achieve desired learning objectives. The article dwelled on the compilation and implementation of the teaching plan of children bronchopneumonia. The first part： teachers showed the case in PBL site and proposed the questions. Students made the Powerpoint after studying and discussing in groups by PBL teaching website， QQ group， SMS platform， etc. The second part: students reported and discussed in groups； the teacher provided the new information and put forward the fol-lowing-up problems; students consulted the documents and materials through the network again； finally teachers made comments on the results. During the teaching， network should be fully utilized and the questions should be proposed progressively at different levels. Teacher should play a guiding role and emphasize the students' autonomous learning.