Objective   To investigate the impact of the air pollution in Shenyang on pupil's lung function and compare the pollution of motor vehicle and coal-burning level in different seasons.

  Methods   According to montoring materials about sulfur dioxide(SO₂), nitro chemcial compound(NO_x), total suspendeed particulate(TSP)and carbon monoxide(CO), and the materials about flow of traffic in Shenyang in the past 10 years, to choose three primary schoos located different areas(divided as primary school A, B, C according to the size of flow of motor vehicle), and choose 100 health pulils living within 1 km from school, aged 8-10 years old(three grades)in each school.To measure the force vital capacity(FVC), forced vital capacity in the first second(FEV1.0), rate of one second(FEV1.0/FVC)and the detection time including: before the heating period(the last ten days of October of 2001), heating period(mid-December of 2001), post heating period(the first ten days of April of 2002)and non-heating period(mid-June of 2002).

  Results   Airway function of children in primary school C are better than primary school A and B.FVC of children in primary school B and FEV1.0/FEV of children in primary school A drops significantly during the post-heating period which are better than primary school C(P < 0.05), but the function of big airway does not change significantly.The analysis of air quality indicates, the pollution of primary school.By the traffic exhausted gas is more severe than primary school B and C.Lung function of students in primary school B improves obviously at postheating period, which indicates the air pollution in primary school B surrounding air; burning-coal type pollution.

  Conclusion   Primary school is polluted seriously by motor exhausted, which influences the pupil's lung function.If effective measures are not taken, motor vehicle exhausted gas will become the primary pollution source.The relevant department should pay more attention to this job.