Combining the design of portal crane luffing mechanism, this paper sets up the math model of the luffing system of the brachial-bridge container crane with combined compensating pulley.

• 本文以新型的臂桥架岸边集装箱起重机变幅机构组合式货物水平位移补偿系统的模型为研究对象，建立了吊重水平落差最小的数学模型。