The milk cooling tank is the main supporting equipment for mechanized milking in the farm, and is more suitable for cooling and storing fresh milk in the farm with manual milking, milk collection stations, and dairy factories. It is mainly used for cooling and storing fresh milk, and can also be used for cooling and storing other liquid materials. It introduces advanced foreign technology, and uses a straight arm to cool a large area. Through the fully automatic control system, the operation can be observed in one step, so that the cooled raw milk can be quickly cooled to the required temperature and maintained at a constant temperature. It prevents bacterial growth and keeps the raw milk in the A-grade state.