The compararive tests of track laying device and pneumatic tire for small garden tractor (Tiller) were done on the hard well-packed ground and pulverized soil. The maximum tractive force of tiller showed 2.5 times on the hard well-packed ground, 3.2 times on the pulverized soil and the maximum coefficient of tractive force increased 0.46 times on the hard well-packed ground, 0.87 times on the pulverized soil if the tiller were attached with heavy track-laying device instead of pneumatic tire. However, the rolling resistance of tiller attached with track-laying device was higher than that attached with pneumatic tires. And the handling of the tiller attached with track-laying device was more difficult.