The embodiment of the invention relates to a method for preventing apparent death of a multi-page browser. A page window is taken as a top window, and the father-son relationship between the page window and a main-frame window is eliminated to lead the page window and the main-frame window to be at the same level; and the page window and the main-frame window with the father-son relationship eliminated are communicated with each other in an asynchronous mode. The embodiment of the invention also provides a device for preventing apparent death of the multi-page browser. In the embodiment of the invention, the main-frame window returns back immediately after sending out a massage without waiting for the processing of the page window through eliminating the father-son relationship between the main-frame window and the page window and adopting an asynchronous communication mode between the main-frame window and the page window, so that even if the page window can not respond, the main-frame window can not be affected, and the problem that apparent death of one page window results in apparent death of the whole browser is solved, therefore, the experience of a user is improved.