The invention discloses water tank type washing equipment. The water tank type washing equipment comprises a washing tank and an ozone device, the washing tank comprises an inner tank and an outer tank which are stacked up, and a first cavity with certain containing space is formed between the inner tank and the outer tank. The outer tank sinks downwards to form a second cavity. The ozone device comprises an ozone generator, an air outlet device arranged on the outer tank and with the top end facing the first cavity, and an air guiding pipe used for connecting the air outlet device and the ozone generator. The water tank type washing equipment can improve the ozone dissolving ability in washing water to a large extent, improves the ozone content in the ozone washing water, and accordinglyenhances the sterilization ability of the ozone washing water remarkably. Meanwhile, the equipment can exhaust ozone into the washing tank so as to sterilize tableware. The water tank type washing equipment can be a water tank type dish washing machine.