In this paper, we study the following Kirchhoff–Schrödinger–Poisson systems: \t\t\t{−(a+b∫R3|∇u|2dx)Δu+V(x)u+ϕu=f(u),x∈R3,−Δϕ=u2,x∈R3,\\documentclass[12pt]{minimal}\t\t\t\t\\usepackage{amsmath}\t\t\t\t\\usepackage{wasysym}\t\t\t\t\\usepackage{amsfonts}\t\t\t\t\\usepackage{amssymb}\t\t\t\t\\usepackage{amsbsy}\t\t\t\t\\usepackage{mathrsfs}\t\t\t\t\\usepackage{upgreek}\t\t\t\t\\setlength{\\oddsidemargin}{-69pt}\t\t\t\t\\begin{document}$$\\textstyle\\begin{cases} -(a+b\\int _{\\mathbb{R}^{3}} \\vert \\nabla u \\vert ^{2}\\,dx)\\Delta u+V(x)u+\\phi u=f(u), &x \\in \\mathbb{R}^{3}, \\\\ -\\Delta \\phi =u^{2}, &x\\in \\mathbb{R}^{3}, \\end{cases} $$\\end{document} where a, b are positive constants, Vin mathcal{C}(mathbb{R} ^{3},mathbb{R}^{+}). By using constraint variational method and the quantitative deformation lemma, we obtain a least-energy sign-changing (or nodal) solution u_{b} to this problem, and study the energy property of u_{b}. Moreover, we investigate the asymptotic behavior of u_{b} as the parameter {bsearrow 0}.