This study aims to determine the effect of using a contextual approach based on critical thinking on the learning outcomes of the history of students at SMK Negeri 1 Lubuk Pakam, Deli Serdang Regency. This study used a quasi-experimental method with the design of the two group pretest-posttest design. The study population was all students of class X majoring in Teknik Komputer Jaringan (TKJ) and class X majoring in Rekayasa Perangkat Lunak (RPL), amounting to 143 students, with a study sample of 72 students consisting of 36 students of class X TKJ-B as an experimental class and 36 students of class X RPL as a control class. Data collection uses the test method. The test results show that the average value of TKJ-B class X students who take part in learning with a critical thinking based contextual approach is 85.28, while the average value of RPL class X students who follow learning with conventional models is 72.64. Hypothesis testing uses the t-test that shows tcount > ttable with a value of tcount at 7.14 and the value of ttable is 1.668. Based on the results of the study it was found that there were significant differences between student learning outcomes that followed learning with contextual approaches and historical learning outcomes of students who followed learning with conventional models. Student learning outcomes using a contextual approach are better than the student's learning outcomes with conventional learning models.