Abstract: This invention relates to a fountain device with water screen circulating and alternating mechanism which is composed of a water supply device, a fountain base, a water screen circulating and alternating mechanism and at least one or more nozzles, wherein the water supply device containing a spurt water stand, a reservoir and a water pump, the fountain base having a water inlet connected to the water pump and a plurality of water holes, which being installed on the water supply device, the water screen circulating and alternating mechanism being composed of a rotary shaft in which having a water diversion hole and an eccentric trumpet water diversion outlet, a drive wheel having a plurality of radial plates and a drive worm connected with the shaft of the drive wheel and engaged with a worm gear installed at the circumference of the rotary diversion shaft, furthermore each nozzle having a plurality of nozzle inlets connected to the water holes of the fountain base, water being led to each nozzle and the radia