Rusaknya moral bangsa dapat diamati dari memudarnya perilaku peserta didik yang dicermati dari cara berperilaku, bertutur kata yang kurang sopan dan tidak beretika. Penelitian ini bertujuan untuk mendeskripsikan penanganan dekadensi moral melalui penerapan pendidikan karakter cinta damai dan nasionalisme di SD Muhammadiyah Karangtengah. Penelitian ini termasuk jenis penelitian kualitatif deskriptif. Subjek dalam penelitian adalah kepala sekolah, guru kelas, guru PJOK, guru PAI, serta peserta didik. Pengumpulan data dilakukan dengan teknik pengamatan, wawancara, dan dokumentasi. Hasil analisis mengindikasikan bahwa dalam mengurangi kemrosotan moral peserta didik di usia sekolah dasar, pihak sekolah menanamkan pendidikan karakter cinta damai dan nasionalisme melalui pembiasaan, integrasi dalam pembelajaran, serta melalui budaya sekolah. Dalam penerapan pendidikan karakter tidak hanya usaha dari pihak sekolah saja, namun juga diperlukan adanya kerjasama antar semua elemen, mulai dari elemen pendidikan, keluarga, maupun lingkungan masyarakat. Hal itu merupakan langkah-langkah dalam mengurangi bahkan mencegah perilaku-perilaku kemrosotan moral yang terjadi di usia sekolah dasar. Handling Moral Decadence Through the Application of Peace Love Characters and NationalismThe damage to the nation's morals can be observed from the waning behavior of students who are observed from how to behave, speak impolite and unethical words. This study aims to describe the handling of moral decadence through the application of peace-loving character education and nationalism in Muhammadiyah Elementary School, Karangtengah. This research is descriptive qualitative research. The subjects in this study were school principals, classroom teachers, PJOK teachers, Islamic education teachers, and students. The data was collected by means of observation, interview, and documentation techniques. The results of the analysis indicate that in reducing the moral decline in elementary school age, schools instill peace-loving character education and nationalism through habituation, integration in learning, and through school culture. In implementing character education, it is not only an effort from the school, but also requires cooperation between all elements, starting from the elements of education, family, and the community. This is a step in reducing and even preventing moral degeneration behavior that occurs at elementary school age.