企业生存年金是一种很重要的辅助性养老金，很多学者对此进行了研究。首先，本文根据已有的研究结果，利用时间序列得到一种推广的利率模型。然后，考虑市场上存在多种相互独立的随机投资利率的情况下，根据投资组合理论得出企业年金保险中多种生存年金组合的精算现值模型。

Many researchers studied the life Annuity because it is very important. Firstly, A generalized stochastic interest rate model is derived by using time series. We then get the life annuity actuarial present value models of annuity portfolio insurance through the portfolio theory, under independent stochastic interest rates environment.