Objective: To examine the relationship between inhibition of ongoing responses deficit with attention deficit and behavior disorder among ADHD children. Methods: Totally 43 children with attention deficit hyperac tivity disorder (ADHD) aged 6-14 years who met the DSM-V criteria for ADHD were recruited. And 38 health children were recruited as the control group. Vision Continuous Performance Task (CPT) and Matching Familiar Figures Test were used to assess attention deficit and behavior disorder feature of the ADHD children. Stop-signal paradigm was used to assess the inhibition of ongoing responses. Results: In the stop-signal paradigm, the ADHD children’s error rate was significantly higher than typically developing children(t=4.34, P<0.01). The ADHD children error rate in the stopsignal task was positively correlated with the wrong number miss rate in CPT task(r=0.45, P<0.01), similar finding was observed in regression analysis,with inhibition of ongoing responses accounted for 20.1% of attention deficit(t=3.21,P<0.01). In ROC curve analysis, the cut-off sore was 15.50 in the task. The error rate in stop-signal task showed no association with miss rate in Matching Familiar Figures Test(r=0.09,P>0.05). Conclusion Inhibition of ongoing responses among ADHD children is associated with attention deficit, but not with existence of behavior disorder.