Oilseed rape(Brassica napus L.)is one of the most important oilcrops in China.The effect of different concentrations of Paecilomyces paecilomyces(ZNC)were irrigated near the root of oilseed rapeat the seedling and bolting stages to explore the effects of ZNC on the growth and development，seed yield and mineral nutrients of oilseed rapebased on our previous work，which could provide scientific basis for the application of ZNC in oilseed rape.The results were as follows.(1)ZNC significantly promoted the root development and shoot growth of oilseed rapeat the seedling stage，among which，root dry weight，total root length，total root surface area，root-shoot ratio and shoot dry weight of oilseed rape irrigated with ZNC at 15 μg/L were significantly increased compared with the control(CK，without ZNC).(2)ZNC significantly increased the contents of all the mineral nutrients，including macronutrients，secondary-macronutrients and micronutrients in the shoot and root of oilseed rape.ZNC had no significant effect on the distribution of nitrogen，but promoted the distribution of phosphorus，potassium，calcium，magnesium and sulfur to the roots.In addition，ZNC promoted the distribution of Fe，Mn，Zn，Cu and B to the roots，and the distribution of Mo，Ni and Co in the shoot under the treatment of ZNC at 15 μg/L，and the distribution of them in the root under the treatments of ZNC at 5 and 10 μg/L.(3)The seed yield of oilseed rape was closely related to thecontent of mineral elements in the seed，and ZNC might affect the seed yield of oil seed rape by affecting the content of mineral nutrients.(4)In the pot experiment，the application of 15 μg/L ZNC at both the seedling and bolting stages significantly increased rapeseed yield.In the field experiment，application of 20 μg/L ZNC at both the seedling stage and the bolting stage increased the pod number per plant and the seed number per pod，and the seed yield was increased by 16.81% under this treatment compared with CK.Therefore，ZNC could improve the nutrient absorption and utilization of oil seed rape by affecting the content and the distribution characteristics of mineral nutrients in roots，stems and leaves of oil seed rapeat the seedling stage，and promote the growth and development，and finally increase the seed yield，among which the application of 20 μg/L ZNC at both the seedling and the bolting stage had the most significant seed yield and yield-increasing effects in the field.