The invention relates to a method for securely accessing a mobile terminal to an information intranet based on a power collection network. The secure access demands of all kinds of mobile terminals (tablet computers, PDA, smart phones and the like) to access a power enterprise information intranet are satisfied, an application program of a power network information intranet is protected by the mature power collection virtual network, and the problem that the mobile terminal and an information collection terminal application in a non-power enterprise information intranet area to access the information intranet in a secure private network mode is effectively solved.