The invention discloses a nitrate dyeing process for transition color furs which relates to a fur dyeing process. The nitrate dyeing process for transition color furs is mainly invented for solving the current problem that transition colors dyed on furs are not natural and attractive. The nitrate dyeing process for transition color furs is carried out according to the following steps: fur washing:degreasing agent, sodium carbonate and ammonia are added into water, and a fur is immersed for 2 hours; mordanting: FeSO4 is added into water, and the fur is immersed for 8 to 16 hours; bleaching: bleaching agent is added into water, and the fur is immersed for 6 to 8 hours; deferrization: oxalic acid is added into water, and deferrization time is 3 to 6 hours; reduction bleaching: 2g to 5g of sodium hydrosulfite is added per liter of water, and processing time is 3 to 8 hours; tanning: aluminum retanning is adopted for the whitened fur, chromium retanning is adopted for the fur to be dyed, and after retanning, fatliquoring and drying are carried out; the dyeing method includes dip dyeing, brush dyeing and template dyeing; and dehydration, air-drying, TP oil application and drying are carried out. The advantage is that a transition color which is gradually lightened is dyed on the whole fur.