The invention discloses an accurate time synchronization method for an electric energy meter and a concentrator. According to the method, a power grid feature point is found out firstly, the moment T0of the power grid feature point in a concentrator is recorded, broadcasting is issued, and when the electric energy meter receives a timing instruction, T1, an error between the two moments comprisesa clock error of the electric energy meter and a communication error, and then the communication error needs to be stripped. Therefore, synchronous sampling points of the electric energy meter and the power grid characteristic points are found out, the time T2 of the synchronous sampling points is calculated according to the time T1 when the electric energy meter receives the instruction, the time difference between T0 and T2 is the clock difference of the electric energy meter relative to the concentrator, compensation is carried out on the electric energy meter, and accurate time synchronization is achieved. In the time calibration process, communication errors are stripped, and more accurate time calibration of the electric energy meter and the concentrator is achieved.