The ground source heat pump system can be divided into two forms according to the different locations of the buried pipe and the buried pipe on the pile foundation. The buried pipe on the pile foundation improves the heat exchange performance of the underground heat exchanger without additional drilling, saving a lot of drilling and buried pipe costs, and speeding up the construction progress. However, due to the uncertainty of pile concrete placement and the greater stress of pile concrete after loading, the buried pipe will also cause adverse effects on the bearing capacity of pile foundation. Based on TRIZ theory, this paper improves the buried pipe technology of pile foundation, and finally determines that the main reinforcement is replaced by steel pipe, which is a more reasonable scheme to realize the organic combination of green environmental protection and structural safety.