A method and an apparatus for secure interaction between terminals are provided. The method includes: indicating or indirectly indicating, by a companion terminal with an eUICC, an Https URL including security information to a primary terminal, so that the primary terminal initiates establishment of a local TLS connection according to the Https URL; receiving, by the companion terminal, an Http request that is sent by the primary terminal by using the local TLS connection, and if the companion terminal determines that the Http request includes the security information, completing establishment of an Https session; and receiving, by the companion terminal, an operation instruction for the eUICC that is sent by the primary terminal by using the Https session.