The disclosure relates to the field of IOS terminals, and provides a method and device for offline webpage browsing and a computer storage medium, wherein the method includes: a Uniform Resource Locator (URL) input by a user is received; when an instruction for adding the URL is received, storing the URL into a preset offline browsing list, downloading a webpage resource file of a webpage corresponding to the URL into a specified storage position, and compressing the downloaded webpage resource file into an executable document; and in an offline state, a URL in the offline browsing list is received and an executable document corresponding to the selected URL is loaded so as to implement offline webpage browsing. The problems existing in the prior art that a webpage resource file is incompletely loaded and the loading efficiency is low may be solved effectively by the disclosure.