The invention discloses a using method for a drop-tube furnace for testing, and relates to the field of drop-tube furnaces for testing. The using method comprises the following steps that step A: thedrop-tube furnace for testing is prepared; step B: the outer surface of each secondary air intake pipe is in threaded connection with a heat pipe condensing section wound on the outer side of the corresponding secondary air intake pipe, and a first heat pipe evaporating section is wound on the outer side of a first sealing gasket; step C: a reaction pipe is heated through a heating layer, and thecombustion powder begins to burn in the reaction pipe; and step D: a separated-type heat pipe starts to work and transfers the heat absorbed from the first sealing gasket and a second sealing gasket to the outer surface of each secondary air intake pipe, so that the first sealing gasket and the second sealing gasket work within a certain temperature range. The invention aims to overcome the shortage of the higher operation and maintenance costs of a cooling device at a sealing gasket of an existing drop-tube furnace for testing, and the operation and maintenance costs are lower than a traditional tap water circulating cooling manner.