Auct of "Four kinds of barrens"in shanxi provice started in 1983. It has reached high tide since 1992，About 1. 5 million mu had auctioned off from 1983 to may of 1993. The auction has furtherly perfected and intensified the soil and water conservation system of job responsibility which put contracting small valley control to house hold first.It is also a great refermation of noncultivated land use system in the region of soil and water loss;basie prerequestite promoting economy of small valley into market economy，a great change of production relationships in hilly mountain areas，and important act to advance productive forces in the areas. The main procedure for the auction are: to give wide publicity， go deep into starting，establish organization，strengthen leadship. unify plannirg

limit scope.evaluate rationally，decide selling price. prnouce publication，compete to enter bid，sign a contract，manage aceording to law.There are following advantages and characteristics for the auction of "Four kinds of barrens". It has come true that proprielary rights are separated from the rights of use，It is easy of restrain and manage for oneself

to speed up the rate of developement and control of soil and water loss region. It is easy to develope and control scientifically and highly qualitive，and to improve economic benefits

It has established reliable foundation to give up poor and to step on rich.