The invention belongs to the network technical field, and provides an advertisement placement distribution method and a device thereof. The method comprises the following steps: obtaining an advertisement placement plan, wherein the advertisement placement plan comprises a corresponding relationship between a placement position and an advertisement number, and the placement position comprises at least a target application of the advertisement placement; The plan proportion of each placement position is calculated, and the plan proportion is the proportion that the placement position appears inthe advertisement placement plan; Detecting an actual usage ratio of the delivery position, wherein the actual usage ratio is the ratio of the usage time of the delivery position to the total usage time; According to the planned delivery ratio and the actual use ratio, the advertisement delivery plan is updated, so as to improve the adaptability of the advertisement plan delivery amount to the actual use situation of the user, and better meet the interests of the advertiser and the user.