The invention discloses a winze blockage blasting device and method. The device comprises an aircraft and a wireless remote controller; a loading platform for fixing a charge is arranged on the top of the aircraft, a camera used for monitoring the position of the charge and the position of a blockage object in real time is arranged on the aircraft, and the wireless remote controller is in signal connection with a flying drive module of the aircraft through a communication module, and is further connected with a display device in communication with the camera. The remote control aircraft is firstly used for estimating the thickness of the blockage object, explosives are mounted on the aircraft, the aircraft is remotely controlled to convey the explosives to the selected position below the blockage object, the explosives are detonated, and the blockage is blasted for dredging. According to the device, the aircraft can reliably and accurately blast the charge in a manner of being tightly attached to the bottom of the blockage object of a winze, although the aircraft is destroyed together with the explosives after blasting, the obvious time and cost advantages are achieved compared with other winze dredging manners, and the construction work safety is ensured.