The invention relates to a method for judging fault types of double-loop interline for a stabilized control system, which comprises the following steps: firstly, the method of getting ready for judging interline faults, secondly, a method for judging double-loop same-name phase interline grounding faults comprises rapidly judging the fault as double-loop area same-name phase interline grounding faults before a brake in an integral group is repeatedly closed if the line and an adjacent line both have some same-name single-phase faults, thirdly, a method for judging double-loop different-name phase interline grounding faults comprises rapidly judging the fault as the line area different-name interline grounding faults when the line interphase faults jump a single phase and an adjacent single-phase faults jump a single phase, fourthly, a method for judging the faults of double-loop single phase which strides a plurality of phases comprises rapidly judging the faults of single phase whichstrides a plurality of phases in double-loop area if a single phase of the line is instantly judged out and adjacent line phases go wrong, fifthly, a method for judging the faults of double-loop multiple phases which strides multiple phases comprises rapidly judging faults of multiple phases which stride multiple phases in a double-loop area if the line and the adjacent both have interphase faults.