After 40 cm and 30 cm deep scarification, photosynthetic characteristics of Zhengdan 958 andTongke 1 were both influenced to different degrees. Leaf area index increased significantly and leaf net photosynthet-ic rate of different positions were also significantly improved. Leaf transpiration rate of different positions under the 40 cm deep scarification increased significantly, stomatal conductance of upper and lower leaves of Zhengdan 958 increased significantly under the 40 cm deep scarification treatment while ear leaf intercellular CO₂ concentration ofTongke 1 reduced significantly under the 40 cm deep scarification treatment. Yields of the two varieties of differentyear both improved significantly, which illustrated deep scarification promoted the photosynthesis, increased yieldof maize, especially for 40 cm deep scarification treatment.