Adopting advanced secondary water mixing technology to make the control of mixing water temperature more precise has the advantages of compact structure, beautiful appearance, and small space occupation. The proportion of hot water, so as to issue instructions to control the boost of the spool to control the amount of hot water, and the secondary bypass valve on the main body adds a mixing area to the system to reuse the floor heating return water, so that the mixing valve can be more efficient. Good operation and regulation. Safe and reliable: Equipped with all accessories to optimize the operation of the system, the pressure differential bypass valve can realize overpressure protection, effectively protect the safety of the circulating pump, and the temperature controller can effectively ensure that the temperature of the water entering the floor heating will not exceed 60C, effectively protecting the floor heating pipeline.