The invention relates to an orderly harvesting machine for vegetables and belongs to the technical field of agriculture and forestry machinery. The orderly harvesting machine comprises a cycle belt conveying device arranged on a walking wheel, a vegetable cutting mechanism extending forwards is arranged at the front end of the conveying device through a bolt, and the vegetable cutting mechanism is either a harvesting device retaining roots or a harvesting device removing roots. By means of design of single action cutters conducting planer movement in the orderly harvesting machine for vegetables, the problem that double-action cutters conducting reciprocating motion are easily blocked by sand is solved properly. Two sets of vegetable cutting mechanisms convenient to replace are arranged so that multiple harvesting requirements can be met. In addition, orderly arrangement of vegetables after harvesting is achieved by the aid of the appropriate conveying device, and therefore, compared with the prior art, the orderly harvesting machine for vegetables has outstanding practical characteristics and remarkable progress.