A kind of tracked harvester for ratoon rice with double-headers and doublethreshing cylinders was designed based on wide swath and light-weighting concept to reduce rolling rate of harvester after harvesting the main crop rice and to improve efficiency of ratoon rice. The harvester was made up of two headers,two axial threshing cylinders with spike-tooth,two cyclone separating and cleaning devices,two granaries and a tracked chassis. This kind of threshing cylinder had a good adaptability to ratoon rice. The cyclone separating and cleaning device had advantages of light mass and low-power consumption. The swath of this tracked harvester reached up to 2.55 m,with feeding quantity of 1.6 kg/s. The material was “Zhongxiang 1”. The working speed,rolling rate and impurity rate were selected as main evaluation indexes. The results of field performance test showed that the working speed,working efficiency and the range of cutting height was 0.24 m/s,0.133 hm2/h,0.35~0.55 m,respectively. This combine harvester had the advantages of light mass,lowrolling rate. It can meet the requirements of harvesting for ratoon rice.