The utility model relates to the technical field of leather processing accessory devices, in particular to an environment-friendly leather liming waste liquid recycling device which can avoid pollution to the water environment and improve the practicability. Waste liquid can be recycled, waste of materials is reduced, the production cost of enterprises is reduced, and the use reliability is improved; the device comprises a waste liquid collecting box, a first motor, a turntable and a cylindrical filter screen, a working cavity is formed in the waste liquid treatment box; an upper annular groove and a lower annular groove are respectively formed in the middle upper part and the bottom of the inner side wall of the working cavity; the device further comprises multiple sets of upper supporting rods, multiple sets of upper supporting wheels, multiple sets of lower supporting rods, multiple sets of lower supporting wheels, a one-way ratchet device, a first rotating shaft, a liquid inlet pipe, a water pump, an acidification regeneration box, a second motor, a negative pressure fan, a second rotating shaft, stirring blades, an acid adding device, a feeding pipe and a recycling pipe. A containing cavity is formed in the acidification regeneration box, a partition plate is arranged in the containing cavity, and the containing cavity is divided into a left cavity and a right cavity through the partition plate.