对锅炉热力过程采用解析———数值混合计算方法建立了计算数学模型。该模型的基础是通过管壁温度的求解解除冷侧流体与热侧流体能量方程之间的耦合关系，然后采用解析———数值混合计算方法分别求解冷热两侧流体能量方程。利用该方法计算了一台６００ＭＷ超临界直流锅炉冷态启动过程，结果表明计算值与测量值吻合得比较好，而且与迭代解法的计算结果相差不大，但计算时间则大为缩短。 On the boiler thermal process using analytical --- numerical hybrid calculation method to establish a mathematical model. The model is based on solving the coupling between the cold side fluid and the hot side fluid energy equation by solving the tube wall temperature, and then using the analytical-numerical hybrid method to solve the fluid energy equations on both sides. Using this method, a cold start process of a 600 MW supercritical once-through boiler was calculated. The results show that the calculated values ​​are in good agreement with the measured values ​​and the calculated results are not much different from those obtained by the iterative method. However, the calculation time is greatly shortened.