Abstract: Allium mongolicum Regel has high nutritional value and ecological value. In response to the high labor cost and lack of specialized harvesters for Allium mongolicum Regel, an automated and orderly harvester was designed to complete the harvesting, orderly transportation, and packing operations, aiming to improve the harvesting efficiency and freshness of Allium mongolicum Regel. Based on the analysis of the overall structure of the harvester, the working principle of the whole machine was described. The design of the cutting device, supporting device, conveying device, and other key components were illustrated, and the drive control system of the whole machine was designed. Field harvesting tests were conducted using the effective harvesting rate and stubble trim rate as evaluation criteria to assess the machine’s operational performance. The results showed that when the machine speed was 3 km/h, the effective rate of harvest and stubble trim reached their highest values of 98.4% and 96.2%, respectively. When the stubble height was 2.5 cm, the effective harvesting rate and stubble trim rate were 98.3% and 95.9%, respectively. These findings verified that the Allium mongolicum Regel harvester design satisfies the requirement of Allium mongolicum Regel harvesting operations.