The utility model discloses a water-cooling die. The water-cooling die comprises a water-cooling die framework and a cooling water pipe, a plurality of cooling water pipes penetrate through the water-cooling die framework, the cooling water pipes are mutually independent and not communicated, two ends of each cooling water pipe extend out of the water-cooling die framework, and one end of each cooling water pipe is a water inlet while the other end is a water outlet. The utility model has the advantages that: 1, the design principle is simple, and the manufacturing process is simple, convenient and feasible; 2, large-flow cooling water circulation can be realized, and the heat dissipation efficiency is high; and 3, the heat dissipation efficiency of the water-cooling die can be adjusted bycontrolling the starting number of the cooling water pipes or the water flow.