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摘要

Embodiments of this application disclose a secure element (SE) applet installation method, applied to a user terminal. The user terminal is provided with a trusted execution environment (TEE) and a secure element, and the TEE is provided with a trusted application (TA). The method includes: obtaining, by the TA, an SE applet command package after the user terminal receives an installation request used to instruct the TA to obtain the SE applet command package; parsing, by the TA, the SE applet command package to obtain target signaling included in the SE applet command package, where the target signaling is signaling used to install a target SE applet; and sending, by the TA, the target signaling to the SE, so that the SE installs the target SE applet according to the target signaling.