Based on complicated harvesting conditions, low efficiency of manual work and heavy laboring intensity in Arundo donaxl production, type 4ZG-2.1 Arundo donaxl harvester has been investigated, some key technologies such as harvesting and transportation and disjoining crops of Arundo donaxl and hitching device with tractor have been solved. The results showed the Arundo donaxl harvester has remarkable characteristics of convenient hydraulic pressure system, reliable saw-tooth type cutter and stalks ordinal spreading, self-propelled style with wide-coverage working. It has important practical value in lightening laboring intensity, improving efficiency and ensuring to increase production rate and economic benefits of planting fields by mechanization harvesting for the Arundo donaxl