Based on HSR2M highspeed reciprocating friction and wear tester,the effects of surface roughness of rotary tiller wetland curved blade,reciprocating velocity,and normal force on the friction and wear properties of wetland curved blade were studied under wet condition,and the wear mechanism was analyzed based on the worn surface morphologies of wetland curved blade.The experimental results show that the friction coefficient and wear volume are increased with the increasing of roughness of wetland curved blade.The wear volume loss is increased with the increasing of normal force,and decreased firstly and then increased with the increasing of reciprocating velocity.The temperature of frictional surface is increased with the increasing of normal force and reciprocating velocity.Under wet frictional condition,the wear mechanisms of wetland curved blade are mainly characterized with abrasive wear,and the pitting corrosion appears in the part of the wear surface.