The invention discloses a power distribution meter box aging analysis method based on theoretical temperature field simulation. The method is characterized by, through wireless passive power distribution meter box and external environment temperature acquisition, power distribution meter box basic data and parameter information collection and measurement point temperature data storage, carrying out theoretical heat loss power calculation; establishing a theoretical space temperature field simulation model; and through comparison calculation and trend analysis of the measurement point temperature and the theoretical temperature field, analyzing the aging process of the power distribution meter box, and carrying out automatic alarm according to the result. The final purpose of the method isto realize aging judgment and abnormal condition analysis of the power distribution meter boxes in a power distribution network through theoretical temperature field simulation and establishment and measurement data analysis and calculation, thereby reducing manual operation and maintenance and repair cost due to distribution and large quantity of the distribution meter boxes and the like, findingaging and unusual conditions of the distribution meter boxes in time and improving operation safety level and automatic level of the power distribution network.