Water purifying tank

The invention relates to a water purifying tank which comprises a tank body. A rough filtration table, a carbon absorption table and an ionic adsorption table are arranged inside the tank body in the mode that the horizontal height is sequentially decreased. The tank body further comprises a first slope for connecting the rough filtration table with the carbon absorption table and a second slope for connecting the carbon absorption table with the ionic adsorption table. The tank body further comprises a water inlet, a water outlet and an ultraviolet light lamp for sterilization. Filtering stones are arranged on the rough filtration table. Multiple vertically-arranged activated carbon blocks are arranged on the carbon absorption table. An absorption device for heavy metal absorption is arranged on the ionic adsorption table. Raw water flows into the tank body through the water inlet, firstly flows through the rough filtration table to filter impurities, then flows into the carbon absorption table, is filtered by the multiple activated carbon blocks layer by layer and then flows into the ionic adsorption table to filter heavy metals in a water body, and meanwhile sterilization treatment is conducted by the ultraviolet light lamp in the whole filtering process to obtain purer drinking water. The water purifying tank is simple in whole structure, low in cost and very convenient to carry.