The invention provides a block chain splitting processing method, device, a block chain node and a storage medium. The method comprises the following steps: obtaining a splitting parameter, wherein the splitting parameter at least comprises a target block chain identifier to be splitted, a splitting point block identifier and at least two service types; according to the service type, the target block chain corresponding to the target block chain identifier is split from the corresponding block of the split point block identifier. By splitting the target block chain corresponding to the targetblock chain,according to the service type, from the block corresponding to the split point block identifier, the block chain with mixed multiple service type data can be split to block chains corresponding to different service types, that is, one block chain can be split into a plurality of block chains, so as to improve the flexibility and manageability of the block chain, thereby improving the management efficiency of the block chain, and can improve the operation efficiency. After splitting, services that can only be executed in serial mode can be executed in parallel.