The invention relates to a method for removing metal ions of paper pulp and bleaching and relates to a technique for removing metal ions of paper pulp and applications thereof in bleaching, belonging to the technical field of paper making. The method comprises the following steps of: (1) carrying out pretreatment for removing metal ions of the paper pulp, namely under the existence of Mg(CH(3)COO)2, Ca(CH(3)COO)2 and EDTA (disodium ethylene diamine tetraacetate), carrying out bleaching pretreatment to deoxidizing sulfate pulp; and (2) carrying out following no-pollution bleaching, carrying out following secondary bleaching treatment consisting of a peroxyacetic acid bleaching stage and a hydrogen peroxide bleaching stage on the paper pulp after the pretreatment for removing metal ions. The invention is simple and easy to operate and has obvious effect; the removal rate of the metal ions is high, and the removal rate of Mn is 80.5 percent. Compared with the conventional EDTA chelation treatment, the strength performance of the paper pulp can be improved; the Mg(CH3COO)2 and the Ca(CH3COO)2 can replace 60 percent of EDTA, consequently, the accumulative effect toxicity of the conventional chelating agent can be obviously reduced.