As the working place for tractor control, the design rationality of tractor cab has an important influence on the safety, comfort and working efficiency of drivers. Based on this, the 5th, 50th and 95th percentile driver human-machine system models were established by DELMIA ergonomics simulation analysis software, and the static comfort of driver 's vision, upper limb extension area, sitting comfort and shifting comfort were analyzed and evaluated. The results showed that all the drivers had a wide working vision and acceptable upper limb accessibility. The sitting comfort of the 50th percentile driver was slightly better than that of the 5th and 95 th percentile drivers. The shifting comfort of the 5 th and 50 th percentile drivers was better than that of the 95 th percentile drivers. The overall layout of the cab is reasonable and the human-machine matching is appropriate.