The invention discloses a fur chromium-free and aldehyde-free tanning process. The process includes the steps of pre-soaking, primary soaking, fleshing, degreasing, washing, enzyme bating and tanning. The degreasing process includes the steps that 0.8-1.2 g / L of a penetrating agent, 0.5-1 g / L of sodium carbonate, 1.5-2.5 g / L of an anion degreasing agent, 0.2-0.7 g / L of an enzymatic soaking agent 100-c, 0.2-0.7 g / L of lipase and 0.5-1 g / L of neutral enzyme FN are added; Ph is 6.5-7.5, the water temperature is 38-40 DEG C, and reaction time is 2-4 h; and after degreasing is completed, dehydration and cleaning are performed, and the tanning process is executed. The tanning process includes the steps that 1.5-2.5 g / L of Bascal S, 1.5-2.5 g / L of fatty aldehyde and 8-12 g / L of an aluminum tanning agent are added, and the water temperature is 38-40 DEG C; and after reaction is carried out for 1.5-2.5 hours, the PH value is 3-3.5, and 10-15 g / L of chromium powder is added at twice. The adjustment solution pH does not need to be adjusted by adding acid as for the Ph in the degreasing procedure, neutral salt and acid are avoided, tanned fur and fleece are loose and flexible, and a fur plate is plump, flexible and elastic. All the indexes can meet the industrial standard requirement. In addition, the pickling procedure is omitted, namely the neutral salt and acid are avoided, and pollutant emission is reduced.