The optimum linear unbiased predictors of linear predictable variable are obtained under the general Gauss-Markov model. Specifically, a class of special prediction functions: b-linear prediction functions is considered. 在一般Gauss-Markov模型下得到了线性可预测变量的最优线性无偏预测,特别地,考虑了一类特殊的预测函数:b-线性预测函数。