The utility model discloses an experimental special test line of vacuum circuit breaker, first big current lead and second largest current lead including the alternate segregation, be equipped with first plain conductor and second plain conductor on the first big current lead, be equipped with third plain conductor and fourth plain conductor on the second largest current lead, first big current lead, second largest current lead is one end and is equipped with the continuous connecting terminal of voltage post who is used for with loop resistance tester, the other end is equipped with and is used for two connecting terminal continuous with the vacuum circuit breaker fracture, first plain conductor, the second plain conductor, the third plain conductor, the tip of fourth plain conductor all is equipped with the 3rd connecting terminal. The utility model has the advantages of can be used for vacuum circuit breaker's return circuit resistance test and mechanical characteristic test, reduction test time simplifies wiring work load, reduces the wiring and reaches repeatly the line time, improves test efficiency.