The invention relates to the technical field of processing of animal fur, in particular to a double-face leather integrated dyeing technology for lambskin. The double-face leather integrated dyeing technology for the lambskin comprises the following steps of selecting skin, dipping the skin in water, removing meat, conducting degreasing, conducting acid maceration, conducting deacidification, stretching the skin, conducting secondary degreasing, conducting pickling, conducting primary tanning, conducting moisture regaining shaving softness, conducting buffing, dipping the skin in water again, conducting retanning, conducting wet buffing, conducting washing and drying, conducting sanding to achieve raising, conducting dry cleaning, dyeing fur, conducting neutralization, conducting board dyeing and fat liquoring, conducting moisture regaining and softening, conducting stretching and inspecting and accepting finished products. According to the double-face leather integrated dyeing technology for the lambskin, lambskin double-face leather raw materials are selected for the double-face leather integrated dyeing process, tanning and dyeing treatment are conducted on fleece and leather boards in a segmented manner, the temperature, the time, the addition of auxiliaries and the like are controlled to be in the best range, and the phenomena that the lambskin is prone to show green and fur is prone to remain are avoided; and besides, in the tanning process, ammonium alum and zirconium are used for primary tanning, then the technological process of low-chromium-content retanning is conducted, in this way, the softness of the lambskin as the double-face leather is greatly improved, and the thickness of the leather board is greatly improved.