To design a suitable cigarettes weight, on the basis of filling power of cut tobacco, build designing model for cigarette unit weight considertng the specification of cigarette, cigarette paper, tipping paper, ecreteur and the weight of filter rod. The examples indicated that the hardness of the cigarette whose weight designed by the modelis suitable.By evaluation, the sensory quality of the cigarette meets the design requirements, and nothing quality defects such as loose-end and fall of burning cone appeared during the process of evaluating. The unit cigarette weight designed by the model could not only guarantee the physical index and sensory quality of cigarette, but also reduce consumption as possible, the model provides a reference for designing suitable cigarettes unit weight.