The experiment was conducted on sweet potato vines (SPV) and sweet potato tubers (SPT) (type 3), arranged in a completely randomized design with 7 treatments and 3 replicates. The treatments (T) were the different ratios of SPV and SPT (on a dry basis) as follows: 0, 70, 60, 50, 40, 30 and 100% of SPT with 100, 30, 40, 50, 60, 70 and 0% of SPV on a dry matter basis, respectively, giving treatments TI, TII, TIII, TIV, TV, TVI and TVII. The treatments were evaluated for sensory and chemical composition at 0, 14, 28, 42, 56, 70 and 84 days. The results showed that after 84 days of ensiling, all of the treatments met the requirements of the silage. The sweet potato silage had a pale yellow colour from the SPV and a dark purple colour from the SPT. The colour in all treatments did not change after 14 days of ensiling up to 84 days. The silage on all treatments had a good smell, which did not change up to 84 days. With increasing ensiling time, DM contents decreased in all treatments (p₃-N content in all treatments fluctuated in the range of 0.1 to 0.5% of total nitrogen. Ash content had no statistical significance (p>0.05) over the ensiling times, except for treatments I, II and VI. ADF content of the same treatment over the ensiling times was not statistically significant (p>0.05) except for T II, III, IV and VI, while NDF content has a large fluctuation. The pH value ranges from 3.3 to 3.84. Organic acids content tended to be low when the mixtures had a high SPT ratio. Levels of acetic acid ranged from 0.48 to 2.21% after ensiling 84 days. Propionic acid content increased slightly over the silage times, except for treatments II, III and V. Butyric acid content after ensiling for 84 days was not detected at the treatment I when only SPV was present in the mixture. All of the treatments resulted in good quality products.