The newly developed water-reducing quick-setting agent embodies the advantages of both water-reducing agent and quick-setting agent. Its addition to cement will require less water for operation and offer the concrete structure with greater strength and better adaptability. This chlorine-free and non-toxic product is of no harm to operators and non-corrosive to the reinforcing bars. Concrete containing this agent is sufficiently viscous, capable of forming thicker grouting layer, and less dust, suppression and minimal material rebound.