In the present paper, we deal with the existence of nontrivial solutions and Nehari-type ground state solutions to the Kirchhoff type elliptic equations of the form:whereand f (x, s) has critical exponential growth on s which behaviors as e 𝛼 0 s 2 with 𝛼 0 > 0. Based on a deep analysis and some detailed estimate, we can determine a fine upper bound for the minimax level under weaker assumption on lim inf t→∞ t𝑓 (x,t) exp(𝛼 0 t N∕(N−1) ) . Our results generalize and improve the ones in Chen et al. (2021) (Lemma 3.1) and Figueiredo and Severo (2016) (Theorems 1.3 and 1.4) for N = 2 and Goyal et al. (2016) (Theorem 1.3) for N ≥ 2.