At present, China is continuously pushing the development of prefabricated construction buildings, and project costs of which will directly affect its popularity and utilization. But to serve the needs for sustainable construction of the economy in China, the substantive construction of prefabricated buildings will become the general trend of the development of the whole industry. Starting from the realistic condition of prefabricated construction, the paper conducts systematic analysis by comparing the prefabricated construction and traditional architecture cost and reasonably analyzing the main influence factors of prefabricated construction cost, and according to the actual situation of a certain community in Shenyang, extracts specific management strategy, and conducts cost management for prefabricated construction.