The invention discloses a model sharing method between a power distribution main station and a terminal. The method comprises the following steps of comparing an update time t1 with a last update time t2, and if t1>t2, updating a power distribution terminal model; obtaining a to-be-updated model; performing mapping association between an IEC61968/IEC61970 model in the power distribution main station and a terminal model based on the IEC61850 standard; comparing with a current mode after the power distribution terminal receives an updated file; uploading a model comparison result by the power distribution terminal; sending an operation instruction by the power distribution main station according to the comparison result; conducting operation by the power distribution terminal according to the operation instruction; and uploading a final update time of the power distribution terminal model by the power distribution terminal. The invention utilizes the mapping function of the IEC61968/IEC61970 and IEC61850 models and provides a powerful guarantee for rapid and accurate position and processing of power distribution network faults.