In this paper, we consider the following singularly perturbed Kirchhoff equation −(ε 2 a + εb R 3 |∇u| 2 dx)∆u + V (x)u = P (x)|u| p−2 u + Q(x)|u| 4 u, x ∈ R 3 , where ε > 0 is a small parameter, a, b > 0 are constants, p ∈ (4, 6) and V, P, Q are potential functions satisfying some competing conditions. We prove the existence of a positive ground state solution by using variational methods, and we determine a concrete set related to the potentials V, P and Q as the concentration position of these ground state solutions as ε → 0.