The invention discloses an automatic code jumbling word wheel cipher lock, comprising a shell; a lock case capable of rotating relative to the shell penetrates through the shell, a lock cylinder assembly capable of rotating relative to the lock case is arranged in one end of the lock case, and a lock piece is connected with the other end of the lock case; a word wheel shaft which can move left andright along with the rotation of the lock case is arranged in the shell, a plurality of bushings which can move relative to the word wheel shaft sleeve the word wheel shaft, each bushing is sleeved with a word wheel which can drive the bushing to rotate together or rotate relatively, and a plurality of code words are arranged on the side walls of each word wheel; each word wheel is provided witha pair of heterospolar and opposite word wheel magnets, and the word wheel shaft is provided with one word wheel shaft magnet corresponding to each pair of word wheel magnets. The lock can realize automatic code jumbling after unlocking and locking.