The invention discloses a cross-platform image caching implementation method based on webview of a mobile terminal. The method comprises the steps of when a user has a demand for loading an image, analyzing image information contained in the demand through the webview of the mobile terminal; adopting a preset mad5 algorithm to name the image; giving priority to checking whether or not the image which the user demands to load exists in local cached images; if yes, directly calling the local image to be checked by the user; if not, continuing to send requests for corresponding network image resources, and finally displaying the obtained image to the user. Through the adoption of the image caching implementation method, the waiting time of the user for loading the image can be shortened, at the same time, the burden of pages can be effectively reduced, the method directly helps to accelerate the response time of sending other requests by the user simultaneously and facilitates the optimization of page performance, and the usage satisfaction degree of the user is improved.