The invention provides a novel leather producing process by pickling and chrome tanning by indefinitely circularly utilizing waste liquid without adding a salt. The leather producing process is characterized in that in the picking process, edible salt is not added, and all waste chrome liquids are completely used indefinitely circularly, so that chromium powder, an edible salt, an alkali extraction agent and other chemical materials are greatly saved; the shrinkage temperature, fullness, granularity quality and other indexes of the prepared wet blue leather are in accordance with the requirement of national standard; compared with the conventional invention (application number: 201010169944.3), the novel leather producing process has the advantages that: the control range of the pH value of the waste chrome liquid in the process is greatly widened from 0.2-1.2 to 0.3-2.5, so that the process is more convenient to operate and control, and excellent wet blue leather can be produced more easily; and the temperature control range in the process is widened, and the operation is facilitated.