Abstract: This paper gives a method for calculating the width of cross cutting desk based on the technological requirement for cross cutting with portable electric chain saws in the Northeast Forest District,and a calculation is made on the basis of random sampling results of the"field accounts of tree-length transportation" taken from 22 forest bureaus including Cuiluan,Dafeng,Fangzheng,Dongjingcheng,Baihe and Wangou. According to the author,the appropriate width of the cross cutting desk is 10—11 meters for CA-10B Jiefang trucks and EQ-140 Dongfeng trucks;for T-138 Tatra trucks,T-148 Tatra trucks,LT-110 Scania trucks and T112H Scania trucks,the appropriate width is 14—15 meters.