The invention provides a method and a device for management of cache pages under the conditions of full cache space and existence of a to-be-accessed page. The method includes: receiving a page access request with information of the to-be-accessed page; judging whether the to-be-accessed page indicated by the information of the to-be-accessed page is in cache or not (pages in the cache are stored in a small root stack manner according to page priority values); if the to-be-accessed page is not in the cache, adopting the to-be-accessed page to replace a page indicated by a root node in a small root stack so as to realize management of the cache pages under the conditions of full cache space and existence of the to-be-accessed page.