In order to improve ballast speed of large floating crane, this thesis presents three ballast tank stratification programs and four multiplex ballast system programs with different ballast methods. After the comparison between multi-programs, we can obtain the best solution of ballast tank stratification and multiplex ballast system suitable to large barge-type floating crane.% 为提高大型起重船的压配载速度，需要根据该类船型特点，进行其压载系统的设计研究。本文提出了三种压载舱分层方案、以及四种采用多种压载方法的复合压载方案，对其进行了多方案比较，确定了适合大型起重船的压载舱分层和复合压载系统设计方案。
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