A track-type pasture combined harvester comprises a track-type chassis walking device, a revolving platform, a revolving mechanism, a harvesting system, a lifting mechanism, a power device and a hydraulic control system, wherein the harvesting system the lifting mechanism, the power device and the hydraulic control system are installed on the revolving platform. The harvesting system comprises a terrain-simulated device, a root cutting device, a front conveying device, a rear conveying device, a chopping device and a round bundle shaping device, wherein combined operations such as root cutting, conveying and lifting, chopping, round bundle shaping, film enveloping freshness retention and unloading are achieved. The revolving mechanism can be fully revolved at an angle between 0 DEG C and 360 DEG C on the machine, so that the whole harvester does not need to make a turn or turn around during line-changed harvesting, and only the revolving platform needs to be revolved at the angle of 180 DEG C. Terrain-simulated root cutting can be achieved by the terrain-simulated device, so a driver does not need to stare at a cutter or adjust the cutter height. According to the invention, the automation degree is high; the key puzzle in mechanization of the pasture harvester can be solved effectively; and large-scale pasture plantation can be promoted.