Bicycle frame lock of improvement

The utility model discloses a bicycle frame lock of improvement, comprising a base plate, the top symmetry of bottom plate is provided with two through -holes, the through -hole fit in has the dead lever, the lower extreme of dead lever is provided with spacing card, spacing card with the bottom of bottom plate offsets, two the cooperation has the locking lever of U -shaped between the dead lever, the inboard of dead lever is provided with fixedly the screw that the locking lever was used, the screw has the nut part, the nut part has a glossy surface, be provided with the catch on the lateral surface of dead lever, the bottom of bottom plate is provided with cast plate, cast plate with bottom plate formula structure as an organic whole, the fixed of bicycle frame can directly be accomplished through the cooperation of locking lever and dead lever to this device when using, avoid the bicycle stolen, can also accomplish further fixing through catch cooperation chain lock simultaneously, avoid stolen, and the nu