Objective To investigate the feasibility of emergency thumb reconstruction for traumatic thumb amputation with bone and tendon from the amputated part, when the soft tissue is severely damaged and the amputated thumb is not replantable. Methods When the soft tissues of the amputated thumb was severely damaged and replantation was not applicable, thumb reconstruction as phase one emergency management was proceeded. The skin and nail bed of the amputated thumb was removed. The bone was in situ replanted, and the tendon was repaired. The nail flap from the ipsilateral toe was grafted and the bone and tendon was wrapped around to reconstruct the thumb. Results A total of 5 patients underwent surgical treatment. All reconstructed thumbs survived with an appearance similar to the contralateral sides. The patients were followed up for 10 months on average (range, 4 to 18 months). The result of two-point discrimination test was 10.1 mm on average (range, 9.2-12.0 mm). The preserved joints possessed partial function. The average range of motion of the metacarpophalangeal joint was 69.6° (range, 20° to 90°). The range of motion of interphalangeal joint was 15° and 20° in 2 patients, respectively. No infection or bone resorption occurred. The injury was healed successfully in 4 patients, and delayed union occurred in one patient. Conclusion Complete bone and tendon from the nonreplantable amputated part combined with wrap-around flap can be used for emergency thumb reconstruction and it can achieve good clinical results.