Screen interface unlocking method and screen interface unlocking device

The invention provides a screen interface unlocking method and a screen interface unlocking device. The screen interface unlocking method includes the steps that when a terminal receives a screen interface awakening instruction, and the terminal receives a screen interface unlocking secret key input by a user and acquires voice information input by the user; when the screen interface unlocking secret key is matched with a preset target screen interface decryption secret key and the voice information is matched with preset target voice information, a control terminal has access to a first operation system; when the screen interface unlocking secret key is matched with the preset target screen interface decryption secret key and the voice information is not matched with the preset target voice information, the control terminal has access to a second operation system. Due to the technical scheme, the invisibility and the safety of a safety system in the dual-system terminal can be increased, and leakage of privacy data in the safety system can be avoided.