Abstract: In recent years,the PV industry in China has entered a fierce competition situation in the stock market. There is a huge demand for the construction of overseas PV industry chain,and it should fully utilize its own advantages and seize the opportunity to "go global" and expand the incremental market. On the basis of analyzing the current development status of overseas PV markets,this paper disassembles the investment costs of PERC,TOPCon,p-IBC,and HJT mono-Si solar cell technologies,and compare the construction costs and equipment investment returns of overseas production lines using these four types of solar cell technology routes.Then,through actual overseas project cases,research and analysis are conducted on the construction of overseas production lines represented by PERC and TOPCon mono-Si solar cell technology. The analysis results show that at present,the PERC mono-Si solar cell production line reserved for upgrading the p-IBC mono-Si solar cell technology and TOPCon mono-Si solar cell technology are currently the most suitable technologies for overseas investment and factory construction.