The invention discloses a multiuser collaborative development-based system structure design platform. The platform comprises a multi-task collaborative modeling decomposition module, a multiuser collaborative modeling module, a multi-task collaborative modeling combination module, a system structure model verification module and a system structure product output module. According to the platform,a system structure model development task is decomposed into a plurality of sub-tasks, and longitudinal combination and transverse combination of sub-task design achievements are realized, so that multiuser and multi-task collaborative development is completed, parallel design and development of complex system projects are realized, and the system structure model development efficiency is remarkably improved.