Abstract: Reserve-production ratio and declining rate are two important indexes in the oilfield development process.Reasonable reserve-production ratio and declining rate are of great significance for the sustainable development of the oilfield.Starting from the definition of the reserve-production ratio and declining rate,the theoretical change formulas of reserve-production ratio under the condition of Exponential decline and hyperbolic decline are deduced.The changes of reserve-production ratio and declining rate under different development modes are analyzed.Combining with the actual situation of Xingbei development area water flooding,the relationships of reserve-production ratio,declining rate,years of stable production and years of production under the conditions of different stable modes and setting reserveproduction ratio mode are studied.And the reasonable Xingbei development area water flooding reserve-production ratio is determined,which provides the basis for the oilfield development adjustment.