The invention relates to a real-time monitoring system for preventing ice blockage of a pressure regulating valve of a natural gas distributing station yard. The real-time monitoring system comprises an on-site parameter collection module, an on-site alcohol injection module, a process control module and a management module, wherein the on-site parameter collection module is used for collecting dew point, pressure, flow, temperature and valve opening parameters before and after the pressure of a natural gas pipeline is regulated; the process control module is used for transferring on-site real-time data to the management module; the management module is used for analyzing and judging the on-site data and then transferring a control signal to the on-site alcohol injection module through the process control module; and the on-site alcohol injection module is used for automatically completing alcohol injection to the natural gas high-pressure pipeline according to the control signal. The real-time monitoring system has great practical significance on preventing the ice blockage of equipment of the natural gas distributing station yard, safely producing, reducing the prevention cost and increasing the digital level during natural gas distributing, the personal safety of working personnel of a natural gas distributing station is effectively guaranteed, the energy waste is reduced, the operation time of the equipment is saved, and the working efficiency is improved.