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This invention relates to an early-strength agent for hypersulfate cement concrete and its application, belonging to the field of building materials. The early-strength component of the hypersulfate cement comprises, by weight, the following components: 70-80 parts C-S-H / PCE, 15-25 parts sodium hydroxide or sodium carbonate, 5-10 parts sodium lactate, and 10-20 parts lithium carbonate. This invention solves the problem of long setting time of hypersulfate cement and slow early strength development of the prepared concrete, and plays a positive role in promoting the application of hypersulfate cement.