Multi-Ethernet photoelectric conversion device and method for receiving and transmitting fiber data

The invention relates to a multi-Ethernet photoelectric conversion device and a method for receiving and transmitting fiber data, by judging the size of parallel data bit m and multi-path Ethernet data total bit 5*n processed by serial parallel conversion of an optical transceiver module, if the parallel data bit m is greater than or equal to 5*n, n-path Ethernet data frames are directly mapped to a fixed virtual circuit in turn so that multi-path Ethernet data can be transmitted in the same optical fiber and are physically isolated with each other, so the method has the advantages of little time delay and optical channel resource conservation; and if the parallel data bit m is less than 5*n, frame positioning is achieved through frame positioning bytes, the n-path Ethernet data frames are mapped to a corresponding virtual circuit so that the multi-path Ethernet data can be transmitted in the same optical fiber and are physically isolated with each other.