1前言科尔沁沙地的治理工程，是三北防护林建设的重点之一，已取得可喜的进展，林地面积逐年增加。为充分利用土地，每年都有相当面积的速生林、小老树、过熟林采伐更新。采伐迹地的伐根清除后，才能使迹地重新利用。以往清除伐根是靠人力，投入大，效率低，影响土地的利用率。 1 Introduction The harnessing project in Horqin sandy land is one of the focuses of the Three-North Shelter Forest Project. The progress has been made gratifyingly and the area of ​​forest land has been increasing year by year. In order to make full use of the land, a considerable area of ​​fast-growing forests, small old trees and mature forests are harvested every year. Cuttings deforestation cleared, can make traces of reuse. In the past, the removal of root was based on manpower, large investment, low efficiency, affecting the utilization of land.