For building harmonious society and new rural countryside, it is necessaryto drive land acquisition reform. Aiming at the all kinds of problems and thecontradictions during the farm land acquisition and assignment in our country, thepaper put forward to rebuilding an Harmonious Interest Mechanisms DuringFarmland Acquisition and Assignment. The newly mechanisms as the core ofChina land system reform, begins the study from the increasing process of farmland value, analysis the relationships among all stakeholders during the wholecycle of farm land changes to urban land, discovers the secrets of the additionalland interest forming, and gives special explanations of the inner meaning ofHarmonious Interest Mechanisms under perfect market economy. Furthermore,the study also analysis s the difficulties both of systems and of mechanisms,finally gives its policy suggestions about how to bridge from nowdays to thefurther.By the deeply research, the paper mainly emphasizes the following point: 1)studies both the basic and the root reasons that the social and the economiccontradictions are made by the now land policy and system; 2) builds a series ofgame model between the stakehoders during the land acquisition and assignment,furthermore gives a new design for the game model; 3) based on the above twoanalysis,puts forward the land harmonious system as the reforment suggestions.The paper's contributions mainly focus on the followings:The first is what the Land Harmonious Interest Mechanisms should beduring farmland acquisition and assignment on the conditional of perfect marketeconomy. The paper points that the Land Harmonious Interest Mechanismsshould be made up of seven key factors, which are land property, government role,land-supply ways, farmer's incomes of losing land, government incomes ofacquisition and assignment, farmers benefits expressing abilities and supervisingmechanism.The second is how to executive the deeply reform waying to the LandHarmonious Interest Mechanisms during farmland acquisition and assignment onthe conditional of perfect market economy. The paper points that it should includethe three most important reforms, which are clearing land property, rebuild the land tax system, and strengthening government public roles.The last is how to improve the current mechanisms to construct thefoundations of the Land Harmonious Interest Mechanisms during farmlandacquisition and assignment. The paper points it is the only way to set up anintegrity body for all stake holders through the land capital relationship. It meansthat all stake holders could have equal opportunities and co-share the landadditional value. The most important result is to carry the farmers of losing landon the same boat during the fast economy development.In the detail research, the paper tries to design a reform road map for buildingthe Land Harmonious Interest Mechanisms. Finally, the paper gives 16improvement actions for current mechanisms and 10 deeply reform actions forcurrent systems. All the research results are policy suggestions as one under theframe of Land Harmonious Interest Mechanisms for China