Lock unlocking method and lock unlocking device of mobile terminal

The invention discloses a lock unlocking method and a lock unlocking device of a mobile terminal. A plurality of lock unlocking methods are set. The number and type of application programs displayed after the mobile terminal is unlocked are respectively set according to the plurality of lock unlocking methods, namely, the mobile terminal respectively defines a plurality of user groups according to the plurality of lock unlocking methods. Each user group can visit a certain amount of functions on a mobile phone and the other functions are completely shielded so that the application programs capable of being used by others are controlled by a user conveniently when the others use the mobile terminal of the user and personal privacy is protected well. Particularly, when the device is used by parents of a child, the child is effectively prevented from secretly using a game function and a net play function of the mobile terminal when the child borrowed the mobile phone.