The Judd-Ofelt intensity parameters Ω2, Ω4, Ω6 of POCl3-ZrCl4-Nd(CF3COO)3 and POCl3-SnCl4-Nd3+ laser liquids are 1.71, 4.09, 6.37 and 1.90, 5.14, 6.86(10-20cm2) respectively, which were determind by spectroscopic method. With these values the probabilities of radiative transition, branching ratio, radia tive lifetime, radiative quantum efficiency of 4F3/2- 4Ijtransition and induced-emission cross section p of 4F3/2 4I11/2 transition(5.15 x 10-20 and 5.69 × 10-20cm2) were calculated. The calculated values are in good agreement with the experimental ones.