The invention discloses a nitrogen-free wet-process refining method for gold-bearing materials. The method comprises the following steps that: gold dissolution reaction adopts hydrogen peroxide (H2O2)as oxidant and adopts hydrochloric acid (HCl) or a wet-process smelting chemical agent capable of releasing chloride ions (Cl<->) as a complexing agent; the oxidant and the complexing agent react insolution to produce free chlorine (Cl<*>); gold is transformed from a solid state into a complex-ion state, dissolved in the solution and separated from insoluble matter in the gold-bearing materialsthrough filtration and washing; an obtained gold-bearing solution is concentrated to increase gold-bearing concentration; and the gold-bearing solution is reduced by adopting oxalic acid as a reducingagent or other suitable reducing reagents so as to obtain sponge-like metallic gold, thus the gold in the gold-bearing materials is refined or purified. As the dissolution reaction in the invention produces no nitrogen dioxide (NO2) or other nitrogen oxides (NOx) pollutants and causes no influence to the air of surrounding environment, the method has good effects of eliminating pollution, savingenergy, reducing emission and protecting environment.