Circulating water centralized treatment device

The utility model provides a circulating water centralized treatment device. Water tank body, a filtering structure is arranged in the water tank body; the filtering structure divides the water tank body into a clear water part and a muddy water part; a water supplementing opening is formed in the top of the muddy water part and used for feeding water into the water tank body, the water flows intothe clear water part after being filtered by the filtering structure, dirt is placed in the muddy water part, a water outlet is formed in the bottom of the clear water part and used for discharging the filtered water, an observation opening is formed in the side wall of the muddy water part and used for observing dirt accumulation conditions in real time, the filtering structure is arranged between the water supplementing opening and the water outlet, the water tank body is divided into two parts, dirt is prevented from entering a circulating water system, and the purity of water in the circulating water system is im