A set of digital signal optical fiber transmission system that uses integrated optical transceiver modules as the main device was designed. The system choose complex programmable logic device EPM7128SLC84-15 for digital signal processing. The Pseudo-random sequence can be generated by switch as input signal of EPM7128 for coding. This coding signal is transmitted through fiber-optic and shown with LED or oscilloscope in the receiver. The system works well, can be used in fiber-optic digital signal transmission experimental teaching, and it has a strong practical significance for the signal transmission in short distance, high speed local area network.