With the development of sports training in China, swimming has become a common way of sports. However, in the process of swimming training, coaches mostly use the traditional way to train students, so the training results are not good. In the 20th century, the emergence of virtual technology can simulate the real situation. Through virtual simulation technology, we can clearly understand the law of things. If the virtual simulation technology is applied to swimming training, the efficiency of swimming training can be greatly improved. In order to achieve this goal as soon as possible, in this article, the author selected the coastal area swimming training case. Through theoretical analysis and field investigation, the author puts forward effective solutions to the above problems. In the process of applying virtual simulation technology to swimming training, the author carefully studies the requirements of swimming training simulation technology and how to carry out cooperative development, analyzes the differences between traditional training and simulation training, and finally comes to the conclusion that in most aspects, simulation training has great advantages, but in the process of training, traditional training methods should still be used, During the training, we should adjust the training plan and focus according to the specific situation at any time. In the use of virtual simulation software, efforts should be made to improve the accuracy of the virtual simulation software. The virtual simulation training should be combined with the traditional training methods to make up for the shortcomings of the traditional training methods. Through remote sensing image and virtual simulation technology, a set of swimming training system is designed and applied to the training to promote the development of swimming.