We propose some normalization of holographic dark energy (HDE) models. Applying the normalization method, we define the dimensionless ratio f_de, explain the physical meaning of f_de and its mean value through dimensional analysis, and propose a hypothesis that the average force of HDE is equal to negative Planck force. We obtain the normalized equation of the original HDE model, and obtain the parameter c_(L)= 0.535, which is very close to the upper limit of c = 0.495±0.039 obtained from Planck + WP + BAO + HST + lens; derive the generalized equation of the model normalization of general HDE (GHDE). The obtained coefficient w_de is inversely proportional to the square of the variable c_L; the normalized equation of the GHDE model is obtained. When Ω_de(z) = 0.683, c_L(z) = 0.471 is obtained, which is in good agreement with c. The normalized equations for the age graphic dark energy (ADE) model and the new HDE (NHDE) model are given; the numerical factor n = 2.894 is obtained, and n = 〖2.886〗 _( - 0.163)^(+ in the ADE model) 0.169) is consistent, c_L = 3, consistent with 1.41 <c <3.09 in the NHDE model. We suggest that the normalization of some HDE models is interesting and important.