The utility model discloses an angle can be adjusted formula solar water heater device, the angle modulation support plate install on the bottom plate through activity hinge, the angle modulation support plate can use the activity hinge rotatory as the fulcrum, guide rail fixed mounting on the bottom plate, lower movable pulley is installed on the guide rail, the support column install under on the movable pulley, the roller is installed on the top of support column, the left end of cylinder axle fix the central authorities at the support column, the right -hand member of cylinder axle is installed in the cylinder, evacuated collector tube and holding water box install on the angle modulation support plate, the right -hand member of right -hand member and angle modulation support plate of bottom plate connect through adjusting the extension spring. The utility model discloses scientific and reasonable, simple structure, convenient to use are designed to it.