The utility model discloses a special high voltage potential transformer disconnect -type check -up platform gets on the bus the hoist and mount of whole vehicle platform through going to hang in the laboratory, if laboratory line suspended load weight is little, also can split typely hoist, after vehicle platform arrives testing site, rise main equipment higher level platform through vehicle platform self mechanism, reach test condition, whole platform need not to get off at testing site, also need not special fixation test car, only needs ordinary equipment transportation car, and the wiring is simple, has improved the availability factor and on -the -spot work efficiency and security of vehicle. The utility model discloses the integrated level is high, is convenient for move the transportation, adopts the long -range line traffic control that has, and is safe high -efficient, especially adapted in 1000kV secret agent high voltage potential transformer's on -the -spot error checking.