The propylene glycol evaporative cooling cold storage unit is suitable for various industrial plants, food, medicine, commercial buildings and other industries, especially for various process cooling needs. It abandons the traditional cooling tower and adopts the evaporative cooling method. With the same heat dissipation, it occupies half the area, makes half the noise, and reduces tap water consumption by 80%. It can be made into centralized and distributed modes, which are suitable for large-scale buildings and small-area buildings respectively.