The utility model provides hot air cooling equipment and a melamine production system. Relating to the field of chemical production equipment, the hot air cooling equipment comprises a first hot air cooler, a second hot air cooler and a momentum condenser, the momentum condenser is connected with the first hot air cooler and the second hot air cooler through control valves, and the first hot air cooler and the second hot air cooler are communicated through a balance pipe. By utilizing the hot gas cooling equipment, the technical problem of excessive process gas consumption in the prior art canbe relieved, and the purpose of reducing the process gas consumption is achieved.