The invention relates to a method for artificially breeding fingerlings of marine ornamental fishes in indoor environments, particularly relates to a method for artificially breeding fingerlings of siganus vulpinus in indoor environments, and relates to the technical field of aquaculture. The method includes steps of selecting and breeding parent siganus vulpinus; carrying out hatching; breeding the fingerlings. The method has the advantages that the parent siganus vulpinus is preferentially selected wild parent siganus vulpinus, bait for parent siganus vulpinus breeding periods comprises high-quality vegetables, seaweeds and fish granulated feed, VC (vitamin C) and VE (vitamin E) are added into the bait in intensive breeding periods, accordingly, the quality of fertilized roe can be improved, excellent effects can be realized, and the fertilization rate and the hatching rate are higher than 80% under natural spawning conditions.