Abstract:Household contract responsibility system has realized initial separation of the ownership and use right, so that farmers get the right to operate relatively independent contractor, and greatly aroused the productive enthusiasm of farmers. However, accompanying with the development of rural economy and society, contradiction between land and people has been sharpened. The marginal productivity of the land has been obvious decreasing trend. Land is run in small family scale, and comparative advantages in agriculture have been declined significantly. Meanwhile, rural surplus labor has an pouring into economically developed cities and urbanization has suddenly been intensified, which revealed the shortcomings of household contract responsibility. Under the premise of stable rural land contract relations and promoting rural land, scale effiency can play a role in promoting healthy and continuous development of rural economy and society.