Starting with the astronomic factors which induce the tide phenomenon, this paperintroduces a method of nonharmonic analysis neural network to predict tide, And thismethod is used to calculate the real tide of 2002 at Hongkong tide station and the resultare compared to the observed data.

In thi spaper, we consider that the orthonormal basis (ψm,n)m,n∈Z for L2(R) is replaced by the nonharmonic wavelet basis ψm,λn=2-m/2 ψ(2-m x-λn), m,n∈Z,λn-n≤1 such that f∈L2(R) has nonharmonic wavelet expression f(x)=∑m,n cm,n ψm,λn.