The invention aims to provide a disjunction electric arc testing method for a switching electric appliance contact for providing effective guarantee for electric arc theoretical studies with even performance figures, high testing efficiency and reliable testing result, and a device thereof. The device consists of a mechanical system and a circuit system, which are connected. The disjunction electric arc testing method for the switching electric appliance contact and the device thereof comprise relay electric arc testing and simulated electric arc testing. The method and the device solve the problem that theoretical analysis or computed result is difficult to verify during the electric arc theoretical studies. The invention provides a relay electric arc testing method and a simulated relay electric arc testing method. The method and the device meet requirement for various testing conditions during electric arc testing, and solve the problems of low testing efficiency and poor confidence level of the testing result. For deep comprehending the arcing mechanism and analyzing the property of the electric arc, the invention further provide a method for quickly extinguishing arc to provide effective support for improving the performance and the reliability of a relay.