Abstract: Different cropping system was conducted to study the nematode diversity structure and Similarity index .Soil nematodes as bioindicators was used to evaluate different cropping system on soil health. The results indicated that Ditylenchus the dominant genera in Continuous cropping , Cephalobus, Eucephalobus, Aphelenchoides, Aphelenchus was the dominant genera in rotation. Thel number of nematodes category has singificant differences between different soil layer during the study period, but the total number of nematodes was not. Continuous cropping system reduce the WI、 、MI. increase of PPI、PPI/MI indxs. rotato can reduce number the PPI、PPI/MI, increase number of WI、 、MI indxs； 、MI 、PPI and PP /MI、WI indxs the to evaluate different planting modes soil health seneitive indicators.