Later Nkosi precursors such as a person with HAuCl4 system for gold catalyst has made breakthrough progress, it has good catalytic activity. When gold load acuity 1% (mass fraction), the deactivation rate is slower than other catalysts. Moreover, gold catalyst deactivation rate has a certain relationship with the reaction temperature, reaction around 90 ℃ the slowest inactivation, below or above this temperature inactivation rate was accelerated. The deactivation at low temperature may be because of acetylene and vinyl chloride polymerization catalyst surface coking, heat inactivation may be the Au3 + ions in catalyst reduction into Au0. And, gold catalyst and other metal chloride catalyst the difference is that it can regenerate after deactivation [12]