With the rapid development of artificial intelligence, in order to solve the problems of many questions from trainees, poor efficiency of teachers in answering questions and high work intensity in the process of thermal power plant simulation practice, this paper proposes an intelligent training expert guidance system for thermal power plant simulation, and this paper uses Visual C++ software programming to implement an intelligent training expert guidance system with voice interaction and video presentation functions, using the speech development package Microsoft Speech SDK, in-depth study of the SAPI it provides, design and implementation of speech recognition function and speech synthesis function. The XML file is used to define the types of questions and the corresponding Q&A test statements for keyword extraction; the video presentation function is realized with the help of Windows Media Player. The test results show that, based on the successful speech recognition, the system can simulate the way of dialogue between teachers and learners and answer learners’ questions in real time. The system has an open function, users can add questions independently, expand the database in real time, jump out of the traditional limitations of space, time and geography, and increase the interest of learning.