The present invention provides a method and a device for switching a subscription manager-secure routing device. The method includes: acquiring, by a second SM-SR from a first SM-SR, a PIC corresponding to an eUICC; acquiring, by the second SM-SR from a second SM-DP, a second PP that is encrypted by using the PIC; generating, by the second SM-SR, a key pair including a public key and a private key; sending, by the second SM-SR, the second PP and the public key to the eUICC through the first SM-SR, so that the eUICC accesses the second SM-SR after deactivating a first PP and activating the second PP; and encrypting, by the second SM-SR, a second PMC by using the private key, and sending an encrypted second PMC to the eUICC, so that the eUICC accesses the mobile network through the second SM-SR.