Abstract:The effects of plastic film (PF) residue on morphology and physiological characteristics of tomato (Lycopersicon esculentum L.) seedlings were studied by pot experiments. The results showed that PF residue inhibited growth of tomato seedlings. The plant height, stem diameter, shoot and root fresh weight, root activity and nitrogen metabolism were decreased. However, PF residue also reduced IBA content of root and ABA content increased, which inhibited lateral root growth, and the bigger was residue of PF, the more significant was inhibited effects. It suggested that the residue of PF had serious influences to the growth of tomato seedlings.