Abstract: At present, due to the lack of effective drag reduction scheme on the existing self-propelled scallion harvester, a large amount of power was consumed and depth of digging was not enough, which was difficult to meet the harvesting needs of scallion in Zhangqiu. The technology of scallion conveying and soil cleaning was not mature, resulting in high damage rate and impurity of scallion and poor harvesting quality. Besides, the design of harvest process of scallion was unreasonable, and the joint harvesting degree of scallion needed to be improved. Aiming at the above problems, 4 CZ-1 type caterpillar self-propelled integrative machine for scallion harvesting was designed. This machine could complete the harvesting work of single row of scallion in one time, such as limiting the depth of the soil, soil loosing, vibration digging, soil breaking, three-level clamping and transporting and collection of the scallion. This machine could effectively reduce the resistance of digging operation, realizing the effective loosening of the wrapped soil and reducing the damage and impurity rate of scallions, which could improve the harvesting quality of scallions. In this paper, the working principle and the design of the main parts of the machine were described emphatically. The whole machine was modeled by 3 d software, the prototype was made, and the field experiment was carried out. The test results showed that the machine worked stably and had a strong adaptability and good harvesting effect. The damage rate of scallions was 3.6%, the loss rate was 1.8% and the impurity rate was 3.2 %, the operating efficiency was 0.053 hm~2/h, which could meet the of the design standard.