The invention discloses a labeling task division method and system. The labeling task division method comprises the following steps of dividing each labeling task into a plurality of sub-labeling tasks, and executing the sub-labeling tasks obtained by division sequentially. Each large labeling task is divided into five sub-labeling tasks; and a task package is distributed independently for each independent sub-labeling task, so that a labeling worker can understand each labeling task conveniently, the labeling worker does not feel relatively troublesome and difficult for continuously labelinga plurality of tasks, the labeling worker can develop a labeling habit of the sub-tasks by using the individual sub-labeling tasks, the labeling worker can conveniently perform labeling according to the task package of each independent sub-labeling task after division, errors are difficultly caused, the task labeling efficiency can be improved, and a lot of time can be saved for the labeling worker during labeling.