The development of sustainable and self-powered energy solutions capable of operating reliably in extreme high-temperature environments, such as fire emergency rescue and industrial monitoring, represents a critical technological challenge. Herein, a triple-functional silyl ether network interspersed with MXene is proposed, for the first time resolving the inherent conflict among the three key properties of high electrical output, thermal stability, and recyclability in a flexible single-electrode triboelectric nanogenerator (TENG). Through this approach, homogeneous distribution of negatively chargeable MXene within a silyl ether crosslinked polydimethylsiloxane (PDMS) network was achieved, leading to an ultrahigh power density of 27.10   W/m 2. Furthermore, the PDMS-based TENG demonstrates exceptional overall performance under high-temperature conditions. This stems from the thermally stable silyl ether network, which enables TENG to maintain stable electrical output as high as 190   V at 140 °C. Additionally, the highly efficient exchangeable silyl ether linkages enable the elastomer to retain undiminished power output even after 10 recycling cycles. Ultimately, the device demonstrates accurate signal transmission in high-temperature environments, reliably conveying vital signs of survivors during simulated fire emergencies, thereby guiding rescue teams in formulating precise rescue strategies. This work provides a novel solution for high-temperature intelligent exploration, fire rescue operations, and multi-source energy harvesting.