The present invention discloses a grid data record processing method. The method comprising: acquiring influence parameters of lag time of an insulator on which flashover is occurred, the lag time being a time interval from the insulator flashover to tripping of a corresponding breaker in a substation is caused; determining the lag time according to the acquired influence parameters of the lag time and a lag time evaluation model; and determining trip-up records caused by the insulator flashover from grid data records according to the lag time. With the method and apparatus according to embodiments of the present invention, trip-up records caused by insulator flashover can be efficiently determined from grid data records.