In the study of nuclear power plant containment, the analysis and calculation of prestress is a very important part. The distribution of the prestressed tendons in the containment is dense and complex, especially in the sensitive part of the gate entrance, the three-dimensional space curve shape appears, which increases the friction loss, and must be taken into account. Based on the analysis of friction and anchorage loss of prestress in CPR1000 stacked containment, a simple calculation method of the length affected by reverse friction and the curve of stress variation along the length direction of the standard section of containment, near the gate entrance and the prestress reinforcement of the containment dome are given for reference by engineering designers.