The invention discloses a method for caching file resources in a mobile phone application through an H5 page. The method comprises the following steps that S1, the H5 page initiates network request connection; s2, the cache system judges whether the network request is a file resource or not, if yes, the step S3 is executed, and if not, the process is ended; s3, the cache system judges the cache state of the resource file, if the resource file is cached, the cached resource is returned to the H5 page, otherwise, the cache system downloads the file resource, and then the downloaded resource is returned to the H5 page; and S4, the H5 page receives the file resources and displays the file resources. According to the method for caching the file resources in the mobile phone application through the H5 page, a user does not need to modify an H5 plug-in end, the caching function is achieved under the condition that any H5 code is not changed, and the result is directly used; and Imgt; the first-time picture loading can be realized by loading the network resources by the labels, and the picture resources are displayed by using the local cache file subsequently, so that the efficiency is high.