AIM:To compare the difficulty of nucleus delivery about "straight line shape" and "anti-eyebrow shape" scleral tunnel incisions and analyse the correlated complications. And to observe clinical curative effects of endothelial repair time and the refractive state. METHODS:A total of 82 cases (82 eyes) cataract patients were accepted small-incision non-phacoemulsification cataract extraction and posterior chamber type intraocular lens implantation surgery. All patients were divided into two groups,one group was accepted 6mm "straight line shape" scleral incision in 2mm after corneoscleral limbus, the other group was accepted 7mm arc length of "anti-eyebrow shape"incision.Lens nucleus were pulled out through a 4mm×5mm pear-shaped lens loop after the hydrodissection,during the time,aspiring the small part of cortex,using Healon twice in front of and behind the lens nucleus and infusing sodium hyaluronate up and down the lens nucleus according to the 12 o’clock nuclear equator whice was upturned direction and the elasticity of incision. RESULTS:The "straight line shape" groups were superior to the "anti-eyebrow shape" groups, lens loop was easier to extend to the behind of lens nucleus and the time of pulling nucleus was shorter, pressure of lens capsule was lower, the risk of posterior capsule damage was decreased, corneal endothelial edema lessened.For anti-eyebrow incision group, the resistance increased when dragging lens nucleus, corneal edema was more serious than the straight line shape incision. Because the friction was increased and nucleus drag time was relatively longer when the top of the nucleus contacted with the corneal endothelium,therefore, probability of the posterior capsule and corneal endothelial damage was also relatively higher,endothelial repair time prolonged. CONCLUSION:The "straight line shape" scleral incision groups were easier to drag out lens nucleus, the time was shorter, capsule pressure and resistance were lower, which could effectively reduce the risk of posterior capsule damage and corneal endothelial edema.