介绍了在χ2假设检验中引入本底和系统误差的方法,并通过最大化混合角θ13的测量敏感度对反应堆中微子实验的基线长度进行优化.考察了对基线有影响的几个因素,包括振荡效应,统计误差,系统误差,本底等.尽管实验条件可能很不相同,最优基线仍可被确定在一个较小的范围内. The method of introducing background and systematic errors into the χ2 hypothesis test is introduced and the baseline length of the reactor neutrino experiment is optimized by maximizing the measurement sensitivity of the mixing angle θ 13. Several factors that affect the baseline are investigated, Including oscillation effects, statistical errors, systematic errors, background, etc. Although the experimental conditions may be very different, the optimal baseline can still be determined within a small range.