The invention discloses a steel plate flame cutting heat-force coupling simulation analysis method based on an APDL language, and belongs to the technical field of metal material cutting process simulation analysis. The method specifically comprises the following steps of 1, defining a unit type and a unit keyword; 2, setting the material parameters; 3, establishing a model and dividing grid units; 4, setting a solution analysis type, a solution analysis method and a solver; 5, applying the initial temperature, thermal convection boundary conditions and structural constraints; 6, defining a preheating flame heat source model; 7, applying a thermal load and circularly solving; 8, outputting a result. The method is compiled by adopting the APDL language, and has very high transportability and general flexibility. In addition, the influence of a flame preheating heat source and the combustion reaction heat of the high-temperature steel is considered at the same time, the temperature and the stress are subjected to coupling solution, and the flame cutting process of the steel plate and the temperature and stress change condition in the cutting process are reflected very dynamically andvividly.