Abstract: To address the need for rapid power restoration in distribution substations after faults in the distribution network, this paper proposes an optimized control method for instantaneous (＜100 ms) cold transfer switching applicable to distribution switching devices. The method adopts a three-layer architecture of "high-frequency perception - pre-decision - adaptive execution", overcoming the traditional bottlenecks of "sampling delay - decision time - execution timing mismatch" in cold transfer operations through high-frequency synchronous sampling (5 kHz), sliding discrete Fourier transform (SDFT) hardware acceleration, Kalman filtering for noise reduction, multi-condition pre-decision-making, and adaptive learning of switch action timing. Experimental results demonstrate that the algorithm can consistently maintain the total cold transfer switching time within 80~95 ms, meeting the GB 50053—2013 requirements for distribution network power supply reliability. Additionally, it eliminates the risk of "loop-closing short circuits" via hard interlocking logic, providing critical technical support for flexible self-healing in distribution systems.