Abstract: The comprehensive management of natural secondary forest were studied from 1974-1985 in the tree farm of Danangou village Huanren county,Liaoning province. The result shows that it is the important way to manage the forest rationally and change the low-yield secondary forest feature.The effect on the research as follow.The woodland increse of 20%,the srand growing stock increase of 14.9%,the forest withered and loss rate have come down from 0.87 to 0.21%,the timber yielding rate have gone up from 46.6% to 51.1%.The biological and bioecological effect of artificial mixed forest of coniferous and broadleaf is better than that of the pure korean pine of the same age,the content of the organic matter more than pure korean pine forest,and the same time,a great economic effect were obtained.