The invention discloses a high-salt liquid-state brewing soy sauce powder and a preparation method thereof. The high-salt liquid-state brewing soy sauce powder is prepared by the following materials in percentage by weight: 68%-85% of high-salt liquid-state brewing soy sauce, 1%-6% of modified starch, 2%-9% of maltodextrin, 2%-8% of salt and 0.2%-25% of flavor regulator through procedures, i.e. blending, homogeneity, vacuum concentration, filtering, spray drying, cooling, sieving, and the like. The high-salt liquid-state brewing soy sauce powder has the advantages of unique lobster sauce taste, enriched fermented flavor without burnt smell, uniform granularity, powder body granule diameter between 60 micrometers and 90 micrometers, compact and smooth surface, good flowability, superior humidity resistance and good instant property, is clear when being recovered to a liquid state, contains no 3-MCPD and preservative and has a quality guarantee period more than two years. Compared with liquid soy sauce, the high-salt liquid-state brewing soy sauce powder has very low water content and greatly reduces the transportation and storage costs.