Abstract: This paper fully affirms the success of the “rain classroom” teaching method during the online class to complete part of the Engineering Training Curriculum Teaching Content; points out the fact that the “rain classroom” cannot provide students with practical links such as on-site visits, object identification and hands-on operation, which leaves students with many “questions”; introduces in detail the follow-up PBL teaching mode to solve the practical problems remained in the “rain classroom” after the students return to school with hammer making and steel plate welding as examples.