The suspended ceiling nail fixing device comprises a nail fixing device body and a silencer connected to the nail fixing device body, the silencer is composed of a silencing
pipe, a pressure adjusting sleeve and a silencing outer sleeve, and the suspended ceiling nail fixing device is further provided with a heat insulation sleeve arranged outside the connecting outer sleeve in a sleeving mode. A silencing chamber is formed between the silencing
pipe and the silencing outer sleeve, the silencing
pipe is provided with a deslagging silencing hole communicated with the silencing chamber, a deslagging gap is formed between the heat insulation sleeve and the silencing outer sleeve, and the silencing outer sleeve is provided with a deslagging hole. The structure forms a new residue discharging
system, residues do not enter the nail fixing device body any more,
corrosion and jamming of internal parts are effectively prevented, and the service life of the nail fixing device is prolonged; the heat insulation sleeve can insulate heat and reduce high-temperature influence; all parts of the deslagging
system act synergistically, the deslagging efficiency and stability are improved, the positive effects of
noise reduction, dust prevention and the like are achieved, it is ensured that long-time work does not need to be disassembled and cleaned, the working efficiency is greatly improved, the decoration cost is reduced, and the overall performance and use safety of the ceiling nail fixing device are improved.