Objective To develop a built-in operation lamp for peacetime and wartime, and to preliminarily observe its trial effect. Methods A built-in operation lamp was designed and developed with polycarbonate as the main shell material, light emitting diode (LED) as light source, ultra-micro button battery as power supply, and powerful rubidium magnet as fixing device. Clinical trials were carried out in many military and local hospitals, and the trial effect was observed. Results The built-in operation lamp was successfully developed, showing good effect in the preliminary clinical trials. The device could assist the operation for deep human tissue with much clearer lighting of the operative field. Additionally, the surgeon could adjust the light freely without itinerant nurses’ help. The device could provide lighting for battle field emergency surgery independently, and could be used on naval ships without restriction of sea conditions during medical service training and non-battle military missions of naval force due to its high portability, mobility and concealment. Conclusion The built-in operation lamp in this study has a great clinical and military value and deserves further study.