Multi-stage filtering and recycling system for circulating water body

The utility model discloses a multi-stage filtering and recycling system for circulating water. The multi-stage filtering and recycling system comprises a raw water tank, a water purifier, a sand filter, a carbon filter, a security filter and a water storage tank which are connected in sequence, the carbon filter comprises a tank body, a shell is arranged outside the tank body, and an annular water outlet channel, an internal separation net, an adsorption resin layer, an activated carbon layer, a fiber cloth layer, an external separation net and a water inlet channel are sequentially arranged inside the tank body from inside to outside; the water outlet channel is communicated with the water outlet, and the water inlet channel is communicated with the water inlet; the water inlet and the water outlet adopt the same connecting structure, and the water inlet is movably connected with the external pipe through corresponding threads. According to the utility model, a multi-stage filtering design of the water puri