Based on the 8-year long experiment at the Zigui Ecological and Environmental Experiment Station for the Three-Gorge Project, effects of five citrus orchard protective management practices were studied on structure of and nutrient (C, N and P) distributions in soil aggregates in navel orange orchards located on slopeland. It was found that Treatment CM (interplantation of citrus trees with white clover, Trifolium repens Linn.) and Treatment SM (mulching of crop straws) were obviously higher than the other treatments in content of > 0.25 mm water stable aggregates (WSA), aggregate mean weight diameter (MWD) and nitrogen content in > 0.25 mm WSA in surface soil (0 ~ 5 cm), and Treatment SM was higher than all the other treatments in phosphate content in > 0.25 mm WSA in surface soil (0 ~ 5 cm); Treatment CH (interplantation with day lily, Hemerocallis citrina Baroni, or contour hedgerow) and Treatment MM (counter embedment of impermeable membrane) were significantly higher than CK (conventional management) and Treatment PC (interplantation with Wheat (Triticum aestivum Linn.) - Peanut (Arachis hypogaea)) in > 0.25 mm WSA and Treatment CH was also significantly higher than CK and PC treatments in aggregate MWD. Compared with CK, Treatment PC did not have any significant effect on > 0.25 mm WSA, MWD, soil carbon in aggregate and soil nitrogen in aggregate in the surface soil (0 ~ 5 cm), but increased soil phosphorus in aggregates in the 5 ~ 20 cm soil layer. Aggregate MWD was significantly related to contents of > 0.25 mm WSA and nitrogen in aggregates.