In this paper, structural mechanics teaching in Inner Mongolia University of Technology is presented as a case. "IMUT civil structural mechanics", which has been used in structural mechanics aided teaching, is developed based on the WeChat public platform. The platform consists of three modules:"basic knowledge", "interactive teaching" and "structure encyclopedia". Through the platform, course teaching's limitation of time and space is broken through, interaction between teachers and students is enhanced. The WeChat public platform is an effective complement to the traditional teaching and can improve the teaching effect.