The invention discloses multifunctional integrated fire extinguishing equipment integrating water mist, foam and dry powder fire extinguishing systems. The device comprises a rack, a control cabinet, a turbine flowmeter, a pressure sensor, a flow display instrument, a pressure display instrument, a pressure regulating handle, a pressure regulating valve, a drain valve, a liquid injection port, a water tank, a liquid level meter, a low liquid level alarm device, a motor, a high-pressure pump set, an air compressor, a dry powder extinguishing agent storage tank, a water pipe winding device, a cable reel, a power supply plug, a spray head or a spray gun, a dry powder spray head and the like. The multifunctional integrated fire extinguishing equipment can realize multifunctional fire extinguishing of the water mist, foam and dry powder fire extinguishing systems, comprises independent use and switching use of the water mist fire extinguishing system, the foam fire extinguishing system and the dry powder fire extinguishing system and combined use of the water mist or foam/dry powder fire extinguishing systems, and is high in integration degree and simple and convenient to operate.