Four salt-tolerant rice varieties(R2803, 11146S/R2803, R889, 1146S/R889) and one salt-sensitive rice variety (Xiangyuenong) were tested under five different salt mass fractions treatments(0‰, 1.5‰, 3.0‰, 4.5‰, 6.0‰) in hydroponic experiments to compare the differences in growth and development indexes. The results showed that as salt mass fraction increased, plant heights, leaf ages, tiller numbers, leaf areas, root bleeding intensities, and root volumes declined in all varieties, with Xiangyuenong experiencing the greatest reduction. Among salt-tolerant varieties, the decline from highest to lowest followed the order: R2803, R889, 11146S/R2803, 1146S/R889. Similarly, effective panicle numbers, grains per panicle, seed setting rates, 1 000-grain weights, and single-hole yields decreased with higher salt levels, with Xiangyuenong showing the largest decline. Hybrid varieties exhibited smaller reductions than conventional ones. At 1.5‰-6.0‰ salt, single-hole yields of R2803 decreased by 37.06%-90.96%, while those of 1146S/R889 decreased by 17.14%-75.59%. Overall, 1146S/R889 showed the least reduction in growth and development indexes, yield, and yield components under salt stress, indicating the strongest salt tolerance.