PT. Petrokimia uses its own port (TUKS) for loading and unloading of raw materials for making fertilizer. However, it is still often found that the demolition activity is slow, causing productivity to decrease and unable to reach the value of the specified loading and unloading contract rate. This study aims to identify the types of waste, analyze the factors that cause waste, and provide proposed improvements to minimize waste that occurs during the loading and unloading process on the types of Phonska cargo, MOP, and ZA using the Lean Six Sigma method through the DMAIC (Define-Measure-Analyze -ImproveControl). The results of this study are 17 demolition waste and 14 waste loading with the highest type of waste, namely waiting dump truck which is included in the waste waiting category. Fishbone diagram analysis results and FMEA show there are 8 main causes of the emergence of waste. All causes of the problem are prioritized to be given recommendations for improvement in accordance with the respective problems that occur, so that the company can take advantage of the research and achieve the value of the loading and unloading contract rate.