The invention relates to the field of cable combustion simulation analysis, in particular to a simulation method for quickly detecting the horizontal combustion characteristic of a single cable. The method comprises steps of based on GB/T12666.2-2008, establishing a combustion chamber model meeting requirements in fire dynamics simulation software, setting cable system model parameters, carrying out combustion simulation, obtaining time-varying data of the temperature and the heat release rate in the combustion process, and judging whether the cable meets the national standard or not accordingto the data obtained by the sensor. The problems of high cost, high risk, long period, poor flexibility, environment pollution and the like of the horizontal combustion test of the solid cable are solved, the method has the advantages of short modeling period, flexible parameter setting, high working efficiency and the like, and the horizontal combustion characteristic of a single cable can be quickly tested.