The invention discloses an express service APP updating method and device based on Weex, equipment and a storage medium, and the updating method comprises the steps: responding to an application starting instruction of a user, pre-downloading of a JS Bundle file corresponding to a Wex page configured by an express service APP configuration file and a gray release configuration file corresponding to the express service APP configuration file, and storing the JS Bundle file and the gray release configuration file in local storage; and obtaining the associated JS Bundle file according to a page access request initiated by a user, and updating the Weex page of the accessed express service APP according to the obtained JS Bundle file. According to the technical scheme, a set of codes can run onandroid, ios and web terminals at the same time, the development cost is reduced, and the development efficiency is improved; hot update can be realized, and the function of dynamically issuing codesis realized; preloading is supported, the page loading speed is increased, and the performance is comparable with that of native pages; various gray strategies are supported, A / B testing is facilitated, different net points are supported, and a new function is preferentially provided; new services are rapidly developed, and verification is facilitated.