在带注资的经典风险模型中研究征税问题.假设税收按照loss-carry-forward制度支付.当盈余低于0时,将采取注资的方式使得盈余达到0而不致破产.利用微分法,得到了期望折现征税总额减去期望折现注资成本总额(V(x))满足的积分-微分方程,给出了初始盈余趋于无穷时V(x)的极限值,并在指数理赔假设下给出了V(x)的显式表达式.除此之外,还给出了一个例子. The problem of taxation is studied in the classical risk model with capital injection, assuming that taxes are paid in accordance with the loss-carry-forward system, and when the surplus is less than 0, the capital injection will be used to make the surplus reach zero without bankruptcy. By using the differential method, Expect the amount of discounted tax minus the integral-differential equation satisfied by the expected discounted capital injection cost (V (x)), and give the limit of V (x) when the initial surplus tends to infinity. Under the exponential claim assumption An explicit expression of V (x) is given, in addition to which an example is given.