High-safety lock for bicycle

The invented high-safety bike lock is a combination of ring and chain bike locks. A rectangular iron box at the left of the said lock is welded to a fixed locking beam and a movable locking bolt linked with the fixed locking beam extends into a core box at the lower part of iron box and is locked by a latch, the wheel is thus locked. A chain box containing a locking chain is at the top part of the iron box. With the chain, the bike and some other body may be locked together to prevent the bike from being moved away. The lock core is fullyenclosed. The said lock features more functions, high antitheft performance and easy operation.