The invention relates to a door lock anti-theft alarm system, in particular to a control method of a code hopping type door lock linkage anti-theft alarm system and a device adopted by the method. The invention comprises a password key with a remote controller, an alarm system and a detection and control circuit, and is characterized in that: the password key with the remote controller adopts thetechnology of integrating the code hopping type remote controller and a mechanical key; the mechanical key is provided with a code hopping type control chip, a wireless transmitting module and a doorlock electricity acquiring circuit; by being combined with a 'door lock linkage' method, the control circuit firstly reads the passwords of the password key by the control circuit, and then accordingto a lock tongue track in the door lock or the moving track of the door detected by a lock state detection system, logical judgment is carried out to control the alarm system and a lock tongue dieback device of the door lock, thus achieving two-way linkage with an assorted alarm host to carry out arming and disarming and preventing technical unlocking. Compared with the prior art, the invention has the advantages of more convenient use, simpler operation and higher safety performance.