Abstract: During the last decades advanced in forest industries countries developed various mobile logging machines(feller-buncher,harvester,processor)in order to realize full mechanization.This paper gives a brief account of such sophisticated mobile logging machinery. China has imported some of such heavy logging machinery from overseas, which are being tested at present.First results indicate that this heavy machinery is not suitable for the present stage of developement in China.In the social-economic point of view,for the moment it is not desirable to introduce such expensive and sophisticated machines,due to the abundant availability of manpower resources at extremely low cost.We should give priority to appropriate technology,which requires less investment and brings more benefits.