The invention provides a switching device electric arc and electric contact experimental facility and a contact resistance measuring method, and belongs to the contact switching device electric arc and electric contact technical field; one teaching experimental facility can finish various feature tests of electric device heating, electric arc and electric contact theory, thus effectively reducing experiment cost, easily maintaining experiment equipment, and providing favorable conditions for teacher and students of the major to develop electric device basic theory experiment and teaching; according to existing electric device arc and electric contact theory teaching contents, the following tests can be realized: 1, DC current arc static and dynamic voltage current feature test under different load conditions; 2, DC arc extinguishing principle test; 3, AC arc dynamic voltage current feature test; 4, AC arc extinguishing principle test; 5, contact resistance feature measuring test; 6, [phi]-[theta] theory verification test; 7, electric device heating feature test under different working mechanisms.