The invention relates to water tank equipment with double filtering function. The water tank equipment is characterized in that it comprises a water tank body 1 and a filtration system, a middle position in the water tank body is equipped with a filtration device 2, the filtration device 2 is a filtration separation plate, a water tank body 1 outlet 3 leading to a water pump is provided with a filter screen 4, the filtration device 2 is located in front of the outlet 3, and A represents the return water direction of the water tank. The filter screen separation plate is disposed at a middle position in the water tank body, and the water tank outlet 3 leading to the water pump is additionally provided with the filter screen. The water tank equipment with double filtering function provided by the invention can filter out foreign substances from water supply, avoids damage of foreign substances to the pump body, and improves equipment startup rate.