Automobile lock unlocking method

The invention relates to an automobile lock unlocking method. The automobile lock unlocking method includes the following steps that (1) a remote control sends a door opening request instruction to a lock, wherein the door opening request instruction carries a door knocking password of a built-in password bank of the remote control; (2) after the lock receives the door opening instruction, the door knocking password is compared with passwords in the built-in password bank, and a question password corresponding to the door knocking password is picked out to be sent to the remote control; (3) after the remote control receives the question password, a response password corresponding to the question password is picked out to be sent to the lock, and meanwhile a delete mark is added to the door knocking password corresponding to the response password; (4) the lock is unlocked after determining that the response password is correct through comparison, and meanwhile the delete mark is added to the door knocking password corresponding to the response password. Compared with the prior art, the three sets of passwords are provided for unlocking, the stealing event caused after passwords are stolen is effectively solved, the unlocking steps are not different from existing steps, and operation is easy and convenient.