The archival mobile information services have such issues as high development threshold, high cost of mobile users and the wall of archival APP. Introducing the Light APP can enhance the cost performance of mobile services, optimize the experience of mobile users and break the wall of the archival APP. Researches on the WeChat public accounts of archival institutions indicate that to use the Light APP in archival mobile information services can build a small and medium development force with relatively low cost and basically realize the localization of services and functions. Accessing to a third party application, developing Html5 applications and accessing to the cloud sites are three main ways to introduce the specific implementation of the Light APP. Besides, its application can also be enhanced by strengthening research on platform adaption, developing new qualified services and sharing common development models.