Abstract: This paper proposes a new parallel shear-warp volume rendering algorithm based on dynamic data distribution.As a result of the dynamic data distribution strategy,the algorithm can make use of the idle broadcast communication line to perform data distributing and rendering in parallel.The new algorithm improves utilization of the communication lines,avoids redundant data storage and reduces resource waste.The improved task distribution and load balancing strategy avoid imbalance load on computing nodes and job jam in pipeline,and improve the efficiency of the algorithm.