This study aims to improve student learning outcomes on electrolyte and non-electrolyte solution materials of class X IPA 2 SMA Negeri 1 Suwawa using a Team-Based learning model with Multi-representation approach. This class action research by Kemmis and Taggart model which is carried out in the stages of planning, acting, observing, and reflecting. The research is conducted in two cycles by applying the Team-Based Learning model with a Multi-representation approach in each cycle. The finding shows that the Team-Based learning model with a multi-representation approach can improve students’ learning outcomes in electrolyte and non-electrolyte solution materials. The improvement can be seen during the learning of cycle I and cycle II. Students’ completeness is 62.9% in cycle I and 100% in cycle II. As well as having met ≥ 80% of success indicators. In addition, there is also an improvement in student activity and learning participation in electrolyte and non-electrolyte solution materials using a Team-Based learning model with a multi-representation approach. Student learning activity also improves with the average percentage of student activity at 90% in cycle I and 92.5% in cycle II with very good categories.