The study aim to (1) develop learning instructional of OrSAEv model (2) implement OrSAEv model in the learning process (3)strengthen the disaster mitigation character in middle school students. This study used 4D as the method. First of the study is develop the instruments which are syllabus, lesson plan, worksheet and handout, then implement them into the learning process. This study was pre experimental by one group pretest posttest design. The samples consist of 15 students of SMPN 1 Donomulyo. The results indicate that learning instructional of OrSAEv can be performed and implemented very well. While using OrSAEv model, students could perform noticeably very well. The result explain that development of learning instructional OrSAEv model could be implemented and successfully increased, students’ activities when they were learned was categorized by very good. There are significant differences in pretest and posttest values so, students’ character in disaster mitigation could be strengthened.