The periodic calibration of the gateway electrical energy metering device usually adopts the manual on-site calibration mode, which has the disadvantages of large workload, low efficiency and high safety risk. This paper introduces a method for developing multi-channel analog collector for remote calibration of gateway electrical energy metering device. It adopts high-precision thread-through CT, high-precision A/D acquisition circuit, CPU processing unit, carrier communication unit and clock circuit. The collector uses the frequency adaptive adaptive window shifting compensation quasi-synchronization algorithm to calculate the electrical parameters, which can accurately measure the electrical parameters of the energy meter. The measurement accuracy is better than 0.05% RD. It can also collect the electrical power pulse, PT and CT terminal monitoring data. Combined with the main station management platform, it can realize various applications such as electric energy meter, PT secondary voltage drop and remote calibration of transformer secondary load, online monitoring. The research content has played an important role in promoting the state inspection of the gate energy metering device, ensuring the safety of operators, and improving the level of operation and management of the gates, ensuring the accuracy of the gate measurement and the fairness of both parties.