Data caching method and device

The invention discloses a data caching method and device, and belongs to the field of data processing. When the residual storage space of a cold storage area is smaller than a first preset threshold value and new data is written into the cold storage area, a first target storage block is determined based on access information of each storage block in the cold storage area; based on read-write identification information corresponding to storage data in the first target storage block, data migration processing is conducted on the storage data. 本申请公开了一种数据缓存方法及装置，属于数据处理领域。在冷存储区的剩余存储空间小于第一预设阈值，且所述冷存储区写入新数据的情况下，基于所述冷存储区中各个存储块的访问信息，确定第一目标存储块；基于所述第一目标存储块中存储数据对应的读写标识信息，对所述存储数据进行数据迁移处理。