The near-stoichiometric LiNbO3 (SLN) single crystals doped Ni2+ in 0.5％ molar fraction in the raw compositions were grown by the Bridgman method under the conditions of taking K2O as flux and at a big temperature gradient for solid-liquid interface. The absorption spectrum of Ni2+ doped crystal was measured. The 381 nm, 733 nm and 1280 nm, which are ascribed to spin allowed 3A2g(F)→3T1g(P), 3A2g(F)→3T1g(F), 3A2g(F)→3T2g(F) transitions of Ni2+ ions in octahedral co-ordination, and 430 nm and 840 nm, which are attributed to spin forbidden 3A2g(F)→1T2g(D) and 3A2g(F)→1E(D) transitions, were observed. The molar fraction ratio of x(Li+)/x(Nb5+) was estimated from the absorption edge of the crystal to be 0.981. The crystal field strength of Ni2+ doped in SLN crystal, Dq=781 cm-1, the Racah parameter B=1096 cm-1 and C=4353 cm-1 were calculated from the absorption spectrum and crystal splitting theory. The emission spectra of crystal in the visible region were investigated under various light excitation, and the emission bands at 500～630 nm, 800～850 nm were observed and ascribed to the d-d transition 1T2g(D)→3A2g(F), 1T2g(D)→3T2g(F) of Ni2+ in octahedral sites, respectively.