Combined the highspeed freespace optical (FSO) link with reliable radiofrequency (RF) link, hybrid LDPC coding together with 2PPM and 16QAM modulation schemes were investigated over the softswitching FSO/RF links in this paper. Then their performances were simulated over the FSO/RF hybrid channels with different FSO turbulence strengths and different data rates. The simulation results show that by using the proposed hybrid coding modulation scheme with two SNR thresholds, about 1.3 to 8.0 dB coding gains at 1×10-6 BER can be obtained. The proposed scheme can significantly improve the efficiency of hybrid FSO/RF communication system, especially when two links have different channel conditions.