The invention discloses a large-capacity purification sink which comprises a sink body, a plasma generator, a water pump, a heating pipe and a plurality of rotary arm nozzles. The sink body is provided with a table top, an opening is formed in the top of the sink body, and the table top surrounds the opening. The plasma generator is provided with an electrode tip part and a control part which are electrically connected, the control part is embedded in the table top, and the electrode tip part is detachably installed on the table top and can be arranged in the sink body. A bottom wall of the sink body comprises a sink bottom plate, a filter screen plate and a rotary arm base. The sink bottom plate, the filter screen plate and the rotary arm base are spliced so that the bottom wall of the sink body can be almost horizontal. The water pump and the heating pipe are arranged on the lower portion of the bottom wall of the sink body. The rotary arm nozzles are arranged on the rotary arm base and communicated with fluid of the water pump. The plasma generator is arranged so that the functions of purification, sterilization and pesticide residue removal can be effectively achieved. The water pump and the heating pipe are arranged on the lower side of the bottom wall so that design space of the bottom wall can become larger. The rotary arm nozzles can be arranged so as to increase washing speed and washing amount.