The Classical 2D Haar's wavelet approximation operators is the product of the 1D Haar's wavelet approximation operators. For the function of the two variables it is 1D Haar's wavelet approximation operators of the order n with respect of the variables x, y respectively. In monograph O. M. Lytvyn "Interlineation of the functions and some its applications, Kharkiv, Osnova, 2002" the method of the construction of the blending function approximation operators is given. In this work the method of the construction of the generalized 2D Haar's approximation operators is investigated. Operators of the generalized 2D Haar's approximation use blending Haar's approximation and keep its high accuracy.