Smart meter is one of the basic equipments for data acquisition of smart grid (especially smart distribution network). It undertakes the task of collecting, measuring and transmitting raw energy data, and is the basis for information integration, analysis optimization and information presentation. In addition to the metering function of the basic power consumption of the traditional electric energy meter, the smart meter has two-way multi-rate metering function, user-side control function, and two-way data communication in various data transmission modes in order to adapt to the use of the smart grid and new energy. Intelligent functions such as function and anti-stealing function