The invention discloses a deep well gravity ice conveying and streaming guiding type rapid and controllable ice melting device, which comprises a ground ice making machine, a ground ice conveying device, a gravity ice conveying mechanism, a downhole ice conveying device and a downhole ice melting device. The ground ice conveying device is connected with the ground ice making machine; the gravity ice conveying mechanism comprises a wellhead hopper and a plurality of sections of vertical well ice conveying pipelines, and a buffer rubber spacer is arranged between every two adjacent sections of vertical well ice conveying pipelines; and the downhole ice melting device comprises an ice melting pool, an ice melting pool ice feeding pipe and a water feeding pipe, a plurality of streaming guidingpartition plates are arranged in the ice melting pool at intervals in vertically staggered, arrayed and laid out modes, and the bottom side wall of the ice melting pool is provided with a hole platewater outlet and a water discharging quantity adjusting flashboard. The invention further discloses a deep well gravity ice conveying and streaming guiding type rapid and controllable ice melting method. The violent vibration and damage phenomena, caused by the high well depth and high fall, of a pipeline and a pipeline support in the ice falling process can be relieved well, the heat exchange effect is good, and the sufficient cooling capacity can be provided for deep-mining high-temperature mines.