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In this paper, I have proved that for a class of polynomial differential systems of degree  n  + 1 (where  n  is an arbitrary positive integer), the composition conjecture is true. I give the sufficient and necessary conditions for these differential systems to have a center at origin point by using a different method from the previous references. By this, I can obtain all the focal values of these systems for an arbitrary n, and their expressions are succinct and beautiful. I believe that the idea and method of this article can be used to solve the center‐focus problem of more high‐order polynomial differential systems.

The Poincaré center‐focus problem for a class of higher order polynomial differential systems