The invention discloses a carbonated-water preparation equipment which comprises a compressor, a dryer, a capillary pipe, a refrigerating pipe, a radiator, a fan, a carbon dioxide gas cylinder and a cold container. The refrigerating tube is arranged inside the cold container, a water inlet pipe, a cold water pipe and a cold water outlet are sequentially connected, the cold water pipe is arranged inside the cold container, and the cold water outlet pipe is provided with a cold-water electromagnetic valve; the cold-water outlet pipe is connected with a cold water return pipe communicated with the inside of the cold container, a pipeline of the cold water return pipe is provided with a water pump, a water spray nozzle is arranged in the water outlet end of the cold water return pipe, and a water baffle plate is arranged at the position, opposite to the water spray nozzle, inside the cold container; the carbonated-water preparation equipment further comprises a carbonated water outlet pipe communicated with the inside of the cold container and is provided with a carbonated water electromagnetic valve; a temperature sensor, a high-water-level electrode and a low-water-level electrode are arranged inside the cold container. By the arrangement, solubility and solution speed of carbon dioxide in water can be greatly increased, intelligent control can be realized by the arrangement of a sensor device, and safe and reliable use of the equipment can be achieved.