Abstract: The principal framework of quasi-entity taxation model is constituted by 7 regulated documents since 2000, while the introduction of new Partnership Enterprise Law has caused great shock to this framework. So the elements in tax system would face many challenges, such as taxpaying bodies, applicable tax rate, expense deduction standard, preferential tax policies, loss sharing, make-up regulations, anti-avoidance regulations, tax administration measures and so on. Therefore, they must be properly corrected and innovated, while adhering to principles of fairness, efficiency, and convenience of administration.