In this paper，at the first stage，literature review method was used to analyse to thefreestyle turn technology and freestyle turns staged technical characteristics respectively. Secondly the paper pointed out those prone errors and the main reasons for the mistakes and correcting method. Thirdly，it divided the freestyle turn stage into swimming pool wall，turn off the wall，water and slide. This should pay attention to the refinement analysis characteristics of freestyle turn each stage technology and training. The aim is to provide some theoretical reference for the freestyle athletes to promote the training level and athletic level. Only when obtain the proper freestyle turned technology，the success in the completion will be made for saving energy and time.