The invention relates to a water-circulation automatic flower watering rotatable flowerpot rack of a fish jar. The flowerpot rack comprises an upright post of the flowerpot rack, a base and a fish jar fixedly arranged on the base, wherein a bracket disc is sleeved on the upright post of the flowerpot rack; the bracket disc is provided with a plurality of flowerpot brackets; and a transmission shaft connected with the upright post of the flowerpot rack is connected with an electromotor arranged on the base through a belt pulley and a belt. The fish jar is provided with a circulating water pump; and a water outlet of the water pump is communicated with a water nozzle through a water pipe. A chassis of the fish jar is also provided with a spotlight seat; and a ground truckle is arranged on the base. Then, when a flowerpot is put on the flowerpot bracket, the flowerpot rack can be driven to rotate by the electromotor through belt transmission. The fish jar can store water and culture fish; a startup program of the water pump is set; the water nozzle can automatically spray water to water flowers; and the sprayed beads drop and converge to the fish jar again to form water circulation. A spotlight power supply is switched on and can lighten parallel color lights. The whole flowerpot rack can be also pushed to different positions.