The invention provides a fur tanning method based on activated rubber seed oil. The method comprises the following steps: (1) adding water and sodium chloride into a paddle-tumbler; then, paddling a paddle of the paddle-tumbler; when sodium chloride is fully dissolved, adding a pickled fur blank; after within 5-10 minutes, adding an aldehyde tanning agent; after 10-30 minutes, adding sodium hydrogen carbonate to adjust the pH value of the mixed liquid in the paddle-tumbler to 5.0-5.5; intermittently paddling the paddle for 4-6 times subsequently; and then standing for 8-12 hours; (2) adding sodium hydrogen carbonate into the paddle-tumbler to adjust the pH value of the mixed liquid to 6.5-7.0; then, standing for 8-12 hours; and taking out the fur blank, and drying the fur blank till the water content is 30-40wt%; (3) uniformly smearing the activated rubber seed oil on the meat face of the fur blank, and then putting in a rotary drum, and intermittently rotating for 4-16 hours under the condition that the temperature is 25-55 DEG C and the air humidity is 70-90%; and 4) taking out the fur blank from the rotary drum, drying the fur blank till the water content is 20-30wt%, and then carrying out dry cleaning to remove the activated rubber seed oil which is not reacted with the fur blank.