The invention discloses an energy-saving efficient low-nitrogen combustion device for a boiler. The energy-saving efficient low-nitrogen combustion device comprises a hearth, wherein the left end of the hearth is provided with an inlet, and the right end of the hearth is provided with an outlet; a primary air inlet is formed in the left side surface of the hearth; a cyclone plate is arranged on the right part of the hearth; a plurality of secondary air inlets are formed in the right side of the cyclone plate; the primary air inlet is connected with a first fan through a first air inlet tube; and a second air inlet is connected with a second fan through a second air inlet tube. Generally, the energy-saving efficient low-nitrogen combustion device has the advantages of being simple in structure, reasonable in design, capable of effectively solving the insufficient fuel combustion problem, effectively increasing a fuel utilization rate, improving boiler operation stability, reducing generation of nitrogen oxygen gas, and being extremely high in use value.