The utility model discloses a mix water valve for solar collector, including valve body and the temperature detect ware of setting in valve body inside, the both sides of valve body are equipped with hot water pipeline and cold water conduit respectively, the middle part of valve body is equipped with cold hot mixing and closes the cavity, and hot water pipeline and cold water conduit close the cavity with cold hot mixing respectively and be linked together, the bottom intercommunication that cold hot mixing closed the cavity has outlet conduit, cold water conduit's exit is equipped with first valve, the exit of hot water pipeline is equipped with the second valve, the lower end screw thread connection of valve body has filter equipment, be equipped with two -layer cavity in the filter equipment, be equipped with the quartz layer in the upper cavity, be equipped with activated carbon layer in lower floor's cavity, filter equipment's lower part threaded connection has the outlet pipe. The utility model discloses a filter equipment that can dismantle is set up in the lower part of valve body, impurity and smell in the mixing water can be got rid of.