The invention discloses a special gas pipeline assembly. The special gas pipeline assembly comprises a metal pipeline, a power source and multiple conductive fixing parts, wherein the multiple conductive fixing parts are sequentially fixed to the metal pipeline in the extending direction of the metal pipeline, the power source is connected with the conductive fixing parts through wires, the conductive fixing parts are arranged at intervals, and the portions, between the adjacent conductive fixing parts, of the metal pipeline and the power supply form loops, so that current is loaded on the metal pipeline. The current is directly loaded on the metal pipeline, the metal pipeline serves as a heating element for spontaneous heating, a traditional mode that a pipeline Is sleeved with a heating sleeve is replaced, the highest temperature resistance is the temperature resistance of the metal pipeline, thus the temperature upper limit is improved, the structure is simpler, the pipeline temperature can be directly measured, thus the temperature control precision is improved, the whole pipeline serves as a heating unit, and effects of elbows do not need to be considered, so that the cost is effectively reduced. The invention further discloses powder coating equipment comprising the assembly.