Ca Mau Fertilizer is the only urea plant in Vietnam operating fluidized bed granulation technology of TEC. After more than 10 years of operation, although it was quite difficult at first time period from the commissioning, many operating options were tested and applied, the plant has solved a number of technical challenges and gradually stabilized and mastered the technology. We have been on the way of doing optimization for granulation and have achieved a certain number of achievements in the last 5 years. Within the scope of this paper, we would like to share some improvements and experiences during the past time.