Problems in this study is the low activity and student learning outcomes. The purpose of this study is to determine enhancement the activity and chemistry learning outcomes once apllied of learning models Problem Based Learning  at class XI Tekhnik SMA Negeri 1 Babelan T.P 2019-2020. This research was conducted at SMA Negeri 1 Babelan. The subjects of this study were all students of class XI IPA.2.  Which amounted to 28 students. The research procedure conducted in this research consists of 2 cycles where each cycle contained planning, implementation, observation, and reflection.Data collection techniques conducted in this study are the observation sheet of learning activity and test result learning. Data analysis technique used is were qualitative and quantitative data. The finding of observation of student’s activity in 1stcycle was the category of non-active students who got 1 students in percentage (3.57%), 4 students in percentage (14.28%) was category of less active student, 8 students in percentage (28.57%) were category of students in enough to know the lesson. 13 students in percentage (46.42%) were category of active students, 2 students in percentage (7.14%) were very active students and the classical active was 15 students in percentage (53.57%), while in the 2nd cycle that was 0 student in category of non-active student, 2 students in percentage (7.14%) were category of less active students, 4 students in percentage (14.28%) were category of active students, 18 students in percentage (64,28%) were category of active students, 4 students in percentage (14.28%) were category of very active students and classical active was 22 In percentage (78.57%). This showed that there was an upgrading of student’s activity from the 1stcycle till the 2nd. While the result of student’s lesson that held on 1stcycle, there were 14 students in percentage (53.57%) in average score was 74.82. While in the 2ndcycle there were 24 students in percentage (85.71%) in average score was 90.89. It canbe conclude that the activityand accounting learning outcomes have improved after the application of Problem Based Learning  models on the students of class XII IPS SMA Negeri 1 Babelan T.P 2019-2020