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Aiming at the problem that the tracked sugarcane harvester has the risk of overturning when it worked in hilly mountainous areas with lateral slope, a chassis levelling mechanism suitable for tracked sugarcane harvesters was designed. Based on the characteristics of the tracked sugarcane harvester with a sugarcane conveying channel in the middle, the scheme of the double-sided levelling mechanism was proposed. The parameter design of the key components of the chassis levelling mechanism and the force analysis of each adjustment cylinder were carried out. A scaled-down test platform was constructed according to the principle of similarity, and lateral tipping analysis and lateral adjustment tests were carried out on the test platform.From the theoretical calculations and test analyses, the lateral tipping angles after lateral adjustment were larger than those before adjustment, and the lateral tipping angle was improved, the centre of mass of the whole machine can be effectively changed. The results of the lateral tipping test showed that the lateral tipping angle before adjustment was 24.31°, and the lateral tipping angle after lateral adjustment was 27.52°, which was 13.20% higher than that before adjustment after lateral adjustment. The lateral attitude adjustment test showed that the maximum lateral adjustment angle was 10°, the adjustment time was 1s, and the adjustment accuracy was within 0.5°,the research result showed that the chassis levelling mechanism could validate the function of lateral attitude adjustment. In the initial state , the adjustment cylinder were subjected to the largest load, and the maximum value was 871.61N, which was converted into the thrust required by the prototype machine was 55783.04N.