According to present law and policy in our country, there is great difference between collective construction land level and county - owned land level. Collective construction land is important property for peasants. Unequal levels between collective and country - owned land make the collective construction land can not be adjusted by the market way. Permitting circulation of collective construction land, changing land - supplying policy, establishing city and country land -using unified market which land - using management is the core, and setting up peasant land - guanretee fund mechanism will protect peasant land property right, promote productive forces developing level and increase peasants' income.