The invention relates to a fitness action teaching and correction system. The fitness action teaching and correction system comprises a server, a camera, a display screen and a sound box, wherein theserver is configured to construct and train a human body behavior recognition and recurrent neural network model to provide computing power for the system, the server is connected with the camera to obtain a fitness action video of a user, the server is connected with the display screen to display a fitness action in the form of a virtual character, so that the user improves the accuracy of the fitness action, and the server is connected with the sound box to remind a system connection condition in voice and to alarm in the case of an error of the system. The fitness action teaching and correction system provided by the invention can provide standard fitness actions, provide error provision and modification opinions by comparing self actions, and intuitively reflect the gap between the self actions and the standard actions by using the virtual characters, so as to regulate the self actions in time, avoid physical injuries caused by incorrect fitness and improve the fitness efficiency.