Automatic descaling shower head

The utility model discloses an automatic descaling shower head, which comprises a sprayer consisting of a sprayer body and a rear cover which are connected detachably and fixedly. The front end of the sprayer body is provided with a plurality of water spray holes, a needle stand is further arranged in the sprayer and movably connected onto a cavity wall at the rear end of the sprayer body through an elastic component, the sprayer forms a front cavity and a rear cavity through the needle stand and the elastic component, the front cavity and the rear cavity are hermetically isolated, and the needle stand is fixedly connected with a plurality of descaling needles capable of being simultaneously in sliding fit with orifices of the corresponding water spray holes. When water pressure in the front cavity drops to a set value, the front ends of the descaling needles are exposed to the outer end face by the elastic component passing through the needle stand. When the water pressure in the front cavity reaches the set