Deep ultraviolet (UV) mechanoluminescence (ML) materials hold broad application prospects in bright-field visualization detection, solid-blind imaging, and information storage due to their shorter emission wavelengths. However, current research on deep UV ML materials primarily focuses on trap control to suppress their reuse. Here, we enhance the deep UV ML of Gd3+ ions by constructing a 4f-5d coupling between Pr3+ ions and the 6P7/2 energy level of Gd3+ ions in the wide-bandgap Lu3Al2Ga3O12 with a garnet structure. The results suggest that the deep UV ML in Lu3Al2Ga3O12: Pr3+, Gd3+ is trap-independent, and its self-recovery property originates from the continuous triboelectric charge transfer between polydimethylsiloxane and the ML particles. Sterilization experiments using deep UV ML against pathogenic E. coli highlight the potential of deep UV ML materials for continuous sterilization applications.