Abstract: 【Objectives】A pot experiment was conducted to investigate the allelopathic effect of decomposing leaf litter of camphor(Cinnamomum camphora)on the growth and resistance physiology of three recipient crops: cabbage(Brassica chinensis), lettuce(Lactuca sativa)and eggplant(Solanum melongena). 【Methods】Through potted trial, the annual amount of leaf litter per unit area was uesd as the basic amount of litter in this experiment, four levels of leaf litter addition were applied to the soil(namely A₁ (25 g/pot), A₂ (50 g/pot), A₃(100 g/pot)and CK(no leaf litter added).Repeated five times for each treatment, the total amount of three crops were 60 pots. After the treatment, on a regular basis, the plant growth index(height and diameter)and resistant physiological index(superoxide dismutase, catalase and peroxidase)and the contents of soil nitrate and ammonium nitrogenfor crop growth were measured.【Results】The decomposing camphor leaf litter showed inhibiting effect on ground diameter and height of the three recipient crops. The inhibition effect on the recipient crops was enhanced with the increment of leaf litter, but with the extension of decomposition time the inhibition effect tended to weaken and even showed the promotion effect on recipient crops; At the early stage(20-40 d)of decomposition of leaf litter, the activities of superoxide dismutase(SOD)and catalase(CAT)were inhibited with the increase of leaf litter addition, and the activity of peroxidase(POD)was increased. After 80 d of decomposition, the activity difference of CAT, SOD and POD were significantly decreased. Different addition during a certain period(30-50 d)remarkably reduced the content of soil mineral nitrogen(nitrate nitrogen and ammonium nitrogen). The sensitive levels of different recipient plants to the allelopathic inhibition of decomposing camphor leaf litter were different. The inhibition effect on lettuce was the strongest, while the inhibition effect on eggplant was the weakest. 【Conclusions】With the extension of decomposition time the inhibition effect tended to weaken. Based on the results above, we concluded that the decomposing camphor leaf litter affected the growth of recipient crops directly or indirectly by releasing allelochemicals, thus the vegetative growth of recipient crops was limited, and accordingly the accumulation of biomass was decreased.