Pros and cons of the Revision of the Indonesia's Corruption Eradication Commission (Komisi Pemberantasan Korupsi or KPK) Law 2019 encourage a wave of demonstrations throughout September 2019. In addition, some Indonesian people also expressed their opinions regarding the Revision of KPK Law 2019 through social media Twitter. This research was conducted to analyze public opinion sentiments towards the Revision of KPK Law 2019 and is expected to be an input for the government to obtain public views, as well as a reference in the decision-making process as needed. Sentiment analysis is performed using Support Vector Machine (SVM), Decision Tree, and Naive Bayes algorithm. The result shows the SVM algorithm has the highest performance and accuracy at 81.70%, followed by Naive Bayes at 80.90%, and the Decision Tree at 74.55%. Based on the results of testing in this study, it was found that more than 75% of Indonesian people who voiced their opinions through Twitter had negative sentiments towards the Revision of KPK Law 2019. The negative sentiments are caused by people who consider this regulation to be ratified in a hurry, while people who have positive sentiments assume that the Revision of KPK Law 2019 can encourage the performance of the KPK to be more objective.