Abstract: Confirming the rational productivity of gas-condensate wells has great guiding significance in ra-tional development for gas-condensate reservoir. Based on knowledge of gas-condensate reservoir in the East China Sea, this paper summarizes the methods of getting absolute open flow of gas-condensate well, per-forms mathematical calculation, and gives principal methods of confirming rational produc-tivity. With testing example of gas-condensate well in the East China Sea, using the method of confirming rational productivity of gas-condensate well, rational productivity of the well has been acquired. Production allocation is adjusted using the result of productivity testing. Good practice result has been acquired.