This paper analyses stark splittings of Nd3+ in glasses. The experimental method of determining fluorescence levels is described and the experimental results of stark splittings of the metastable states and ground states for four types of Nd3+-doped silicate glasses are given. In addition, the radiative and non-radiative transition rate of the 4F3/2 state, the stimmulative emission cross-section σ, the radiative quntum efficiency η, the fluorescence branching ratio β and the lifetime τ are also determined experimentally for thirteen types of Nd-doped glasses with different compositions. On the basis of experimental results, the relation between non-radiative transition rate and compositions of the hosts is discussed.