The invention discloses a novel anti-theft lock. The novel anti-theft lock comprises a lock cylinder, wherein the inside of the lock cylinder is divided into a lock hole and a lock latch; the lock hole is formed in the lock latch; a lock barrel is mounted on the outer surface of the lock cylinder; pin tumbler grooves are formed in the lock barrel; springs and pin tumblers are fixed in middles of the pin tumbler grooves; the pin tumblers are arranged right below the springs; a lock tongue and a key are further arranged in the lock cylinder; the key is inserted into the lock hole to open the lock tongue, and the key and the lock hole are both J-shaped. According to the novel anti-theft lock, the lock cylinder is arranged to be J-shaped, the key structure of the lock cylinder is hidden and made to be invisible, and tools except the key cannot reach the key cylinder, so that the anti-theft performance is greatly improved and diversified development of lock cylinder structure types is promoted; besides, a better anti-theft effect is realized through simple change of the lock cylinder, the cost can be reduced, and the novel anti-theft lock has a wider application market.