Abstract: Based on the previous research work, performance hotspot of source bars deployment algorithm derived from plant growth simulation algorithm was obtained. It was improved with parallelization principle, in which the original sequential process was converted into that of parallel compute unified device architecture (CUDA) thread blocks, and the massively parallel processing ability of GPU can be effectively used, which makes the performance of algorithm greatly speed up. Several examples show that, based on the advantage of new algorithm, integral efficiency is increased by 30 times at least, so the new algorithm is highly competitive.