The invention discloses a method for verifying the effectiveness of an intelligent distribution transformer terminal APP. According to a power distribution Internet of Things hardware platform software APP architecture, in order to prevent the terminal from being forcibly and manually installed with an illegal application program after leaving factory and being installed, the method can effectively solve the legality problem of the APP installed in the novel intelligent distribution transformer terminal through a second-level center, a terminal side and an update verification three-level verification scheme while encrypting a legal APP.