The invention relates to a method for aligning section raw data on the basis of double time scale quantitative evaluation measurement point delay and performing prediction and modification. By the method, multi-source section raw data with different delay can be aligned. According to data delay differences among different regions, different stations and different transmission types, the method comprises the following steps of: quantitatively evaluating delay time of each measurement point by using sampling sequences with two time scales; predicting and modifying the current numerical value through an autoregression-sliding average model; evaluating the precision grade of the numerical value and a delay distribution interval; and providing for a state estimator. By the method, the data delay of different measurement points can be quantified accurately; the current section numerical value of the measurement point can be predicted and modified according to the delay; and precision weightis endowed, so that the aligned multi-source real-time data is integrated into a section closer to the operation condition of the current power grid.