In order to improve flexibility and operation efficiency of combine harvester, a pivot steering transmission was designed and tested. A clutch system with wet friction plate was used to transmit the positive and negative power Results showed that the exchange between forward rotation power and reverse rotation power was soft and reliable. Theoretical turning radius of combine harvester was zero. When steering at the same angle, the turning stroke and power consumption were reduced by 50% and 41.43% respectively, compared with traditional turning mechanism in one side brake. It could also reduce the damage to soil. The pivot steering transmission could reduce the idle stroke of field working and improve intelligence of combine harvester.