The utility model discloses a solar water feeding alarm. The device comprises a connecting pipe connected with a solar water return port, the device further comprises a buzzing alarm device. The lowerend of the connecting pipe is sleeved with a protective shell through a pipe clamp device. a fixed contact is fixedly mounted outside the protective shell; a limiting hole is formed in the position,located on the lower side of the fixed contact, of the protective shell; a swing rod is mounted in the limiting hole in a swinging manner; the outer end of the swing rod is provided with a moving contact corresponding to the fixed contact. A water blocking device is installed at the inner end of the swing rod, an opening in the lower end of the connecting pipe abuts against the water blocking device, the fixed contact and the movable contact are connected with the buzzing alarm device through wires respectively, and a protective cover is installed at the position, located above the protectiveshell, of the connecting pipe.