The effect of optical fiber transmission (dispersion, PMD and nonlinear effects, etc.) will seriously affect the transmission speed and further improvement of the distance. Consequently, it is essential to work out new super forward error correction (Super-FEC) codes with better performance so that higher coding gain and better error correction performance will be received. This paper briefly introduced the low density parity check (LDPC) codes, and then proposed a SFEC code based on LDPC code in optical communication system. The novel LDPC(3969,3720) code with 6.68% redundanc was constructed., and the simulation result of the FEC code was showed up. It not only compared with those of the RS(255,239)code and BCH(3860,3824)+BCH(2040,1930) code, but also analyzed and discussed the problem that the encoding and decoding of LDPC circuit design and implementation. Through the theoretical analysis and simulation results show that this super-FEC code has a good performance,and can save hardware costs so that it is suitable in optical communication system and can be used as a super-FEC candidate code.