The invention belongs to the technical field of weight measurement, and particularly relates to device for accurately measuring black-bone chicken weight data and a measurement method thereof. The top of a body is fixedly connected with a set of clapboards, a channel is formed between the clapboards, the top of the body at one end of the channel is provided with a weighing platform, and the clapboards are uniformly provided with a set of through grooves; and a conveying belt is arranged on the side, away from the channel, of the clapboards, and multiple rows of driving rods are evenly distributed on the periphery of the conveying belt, penetrate through the through grooves and extend into the channel. The conveying belt is driven by a driving roller to rotate slowly, black-bone chickens are conveyed into the channel one by one slowly, scare on the black-bone chickens is reduced, it is guaranteed as far as possible that the black-bone chickens are kept quiet when moving to the weighing platform, walking of the black-bone chickens on the weighing platform is reduced, reading fluctuation during weighing of the weighing platform is reduced, and the weighing precision is improved.