The present invention relates to a purification method for recombinant human follicle-stimulating hormone (FSH), including anion-exchange chromatography, affinity chromatography, and gel filtration chromatography. The method is low in cost, few in steps, simple and feasible, and stable in quality; and no complicated denaturation and renaturation processes are comprised in the method, and the use of reversed phase chromatography, metal chelate chromatography or hydrophobic interaction chromatography, which have a greater impact on protein activity, is prevented. According to the method, firstly, anion exchange of flow-through mode is used for removing a large number of contaminating proteins, pigments and some residual DNA, endotoxin and host proteins, which not only protects the subsequent affinity filler, but also achieves a coarse purification and concentration enrichment; affinity media are conjugated with camel-sourced antibodies, the carrying capacity is high, and only an intact FSH molecule, instead of a single subunit, can be bound specifically, so degraded monomer subunits are better removed; and gel filtration can further remove residual DNA, endotoxin and host proteins, and can also remove protein aggregates and inadequately glycosylated FSH proteins.