Self-lubricating mechanical seal slurry pump

The invention relates to the technical field of slurry pumps, and provides a self-lubricating mechanical seal slurry pump which comprises a pump body, a pre-cooling box, a water inlet spray head, a heat-conducting fin group, a cooling air head, a cooling cylinder, a heat-conducting box and a cooling ring pipe, a bracket is arranged on the lower side of the pump body, a cavity is formed in the bracket, and one side of the pump body is communicated with a cooling water connector; the pre-cooling box is located on one side of the pump body, the multiple water inlet nozzles are all located on the upper side of the pre-cooling box, a water inlet assembly is communicated between the multiple water inlet nozzles and the pump body, the multiple cooling air heads are all obliquely connected into the pre-cooling box, the cooling cylinder is located on one side of the pre-cooling box, and a water outlet pipe is communicated between the pre-cooling box and the cooling cylinder. The bottom end of the cooling cylinder is f