Abstract: The CHP unit with fast power output adjustment can improve the operation flexibility of the electrothermal coupling system in the industrial park and promote the absorption of new energy and reduce carbon emission. The CHP dynamic constraints in the form of differential equations can describe the variation of variables in detail, and considering dynamic constraints in dispatching can grasp the operation state of units and reduce the risk of accidents. Therefore, aiming at the minimum cost of industrial parks and considering carbon trading process, a low-carbon economic dispatching model of industrial parks considering CHP dynamic constraints is established. Then, on the basis of the sequential framework, the differential algebraic equations of the simulation layer are discretized by the orthogonal configuration method on finite element, and the nonlinear programming problem of the optimization layer is solved by the improved adaptive differential evolution algorithm. The results of examples show that the orthogonal configuration method can obtain accurate results with fewer discrete points, improve the solving efficiency, and the CHP unit with fast power output adjustment can effectively improve the low-carbon economic level of the industrial park.