Abstract: It’s noticeable that reservoir has been polluted in the course of well drilling, production and down-hole servicing in oil field development. The multifunctional packaged tubing string for oil production technology introduced in this paper is the multifunctional device integration of oil production, reservoir protection and monitoring. It can not only solve such problems arose in well production as hot liquid decreasing reservoir pollution., but also monitor under ground parameters effectively such as liquid-producing profile, formation pressure and water cut etc.. This tubing string is being operated simply and safely.