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 5^th, 50^th and 95^th 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 50^th percentile driver was slightly better than that of the 5^th 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.