Abstract: The B/A values of NaCl solution and artificial sea water (prepared by Lyman-Fleming formula)with different salinities and different temperatures have been measured and compared with the calculated B/A values in literature. The results show that the B/A values of NaCl solution increase linearly with increasing temperature, and increase slightly with increasing salinity; the B/A values of artificial sea water increase as temperature increases. The results indicate satisfactory agreement with those values obtained in literature, NaCl solution can be used to simulate sea water approximately.