Asthma is a chronic inflammatory airway disease,the goal of treatment is achieving total control.The correct diagnosis is a prerequisite for evaluating asthma control.A number of factors contribute to suboptimal asthma control,individuals may have different response to the same anti-asthmatic drug due to genetic variations,co-morbid rhinitis is often lead to poor control,there are also a lot of triggers may influence asthma control including respiratory viral infection,allergens,food,climatic change.Moreover,parental asthma perception,adherence,and proper use of inhaler device are critical for asthma control.Appropriate prescribing of antibiotics were also a big problem in the treatment of childhood asthma.Enhance the knowledge of asthma control influencing factors will make a better control for asthmatic children.