The traction performance of the tractor varies according to the soil conditions. In reclaimed land, the driving wheel of tractor frequently occurs sinkage and slip as poor soil conditions. Therefore, the tractor should be designed considering soil properties especially for reclaimed land. This is a basic study to develop a tractor suitable for reclaimed land. For this reason, a technology was developed to improve the traction performance of tractor during field operations and the traction performance was evaluated according to the soil conditions of reclaimed land. The field experiments were conducted at two reclaimed lands. The tractor load measurement system was composed of axle rotation speed sensor, torque meter, six-component load cell, GPS, and data acquisition system. Soil properties were measured specifically soil texture, water content and cone index. Referring to previous researches, the tractor traveling speed was set to B3 (7.6 km/h), which was frequently used for plow tillage. Soil moisture contents were 29.8 and 48.6% in fields A and B, respectively, and cone index was 2.3 times higher in field A than in field B. As a result of analyzing the tractive efficiency using the Brixius model, the tractive efficiency of the tractor was improved by about 4∼5% when using dual tires. The slip rate was lower in the tractor with dual tires in fields A and B, and decreased by 6.7 and 8.5%, respectively, compared to tractor with single tire. The traction power was about 7 kW higher in the tractor with dual tires compared to the 90 HP class same engine, which is judged that the tractor with dual tires showed the same traction performance as the 100 HP class tractor with single tire. With the use of the dual tires, the contact area of the tractor was increased by about 60% compared to a single-tire tractor, resulting the tractive efficiency increased about 5-6%, which means improved traction performance. Therefore, it is judged that the traction performance of this study is better when the dual tires is used during reclaimed field operation.