From the perspective of data compression, parallel rendering system based on InfiniBand is set up in order to improve the frame rate. Data classification in parallel rendering system is performed; and the thresholds are set according to the data of the current frame; the lossless compression is applied to the geometric data which reach up to the critical value. The effects of three types of data compression algorithms, LZ77, Lempel-Ziv-Welch(LZW)，Lempel-Ziv-Oberhumer(LZO), are researched and compared. The experiments results show that，LZ77,LZW and LZO algorithms can improve the frame rate of system; LZO algorithm increases the frame rate of system most significantly with the best stability, and the system frame rate is increased by nearly 60%. Lossless data compression can improve the performance of parallel rendering system significantly.