The invention discloses a forest type storage structure and a method for a distributed erasure code hybrid storage based on multiple storage media, which are characterized in that data block data of erasure codes are placed in a solid state disk for storage in a distributed storage system, and data check block data of the erasure codes are placed in a mechanical hard disk for storage. The method comprises the following steps: (1) classifying data storage media in a distributed storage system, and establishing a forest type hybrid storage structure; (2) classifying erasure code data in the distributed storage system into data block data and check block data, and marking the data block data and the check block data; and (3) placing the classified erasure code data on a specific tree of a forest type storage structure for distribution and disk falling. In this way, hybrid architecture storage of erasure code data on distributed storage based on multiple storage media is achieved. According to the invention, excessive wear of SSD caused by erasure code write amplification can be solved, the system performance is improved with lower cost, the service life is prolonged, and the reliability is enhanced.