Through establishing finite element mode of crossing-Shipu bridge scaffold,the paper analyzes axial force,pulling stress and displace-ment of support system,and testifies the support system safety and numerical calculation reliability. Results show that:the maximum stress value and displacement value of the support system don’t exceed steel pipe strength value. In additional,the support system rigidity and stability meet construction demands as well.%通过建立石浦高架桥某跨现浇箱梁满堂支架的有限元模型，计算分析支架系统的轴力、拉压应力及位移，以验证支架系统的安全性及数值计算的可靠性，结果表明：支架最大应力值与位移值均未超过钢管的强度值，支架系统的刚度和稳定性满足施工要求。
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