The invention discloses a single-phase electric energy meter terminal heating monitoring method. The method comprises steps that firstly, a current test point with a relatively small error is selected; a ratio of a live wire current to a null line current is read to determine a standard reference value Ki, a ratio Kj of the live wire current to the null line current in the operation process is monitored in real time, the change of the Kj relative to the Ki is determined, and whether a live wire terminal generates heat or a null line terminal generates heat can be determined by combining characteristics of a current loop. The monitoring method is advantaged in that terminal heating fault detection is achieved, the burnout probability of an electric energy meter is reduced, the fire risk isreduced, the monitoring method does not depend on a temperature sensor, the cost is reduced, the monitoring method is simple, and an MCU with the high-speed operational capability is not needed.