Objective To investigate two kinds of methods of lymph node dissection for early effects on the prognosis of the patients in the treatment of lung cancer by comparative study,and provide guidance for clinical treat-ment.Methods 98 cases of early stage lung cancer patients who were taken using elective surgery were selected in the study.According to the random number table,they were divided into two groups of 49 cases for each other.Sort of an odd number of patients in the observation group,and given systematic lymph node dissection (LND);sort of an even number of patients in the control group,which was systematically sampled lymph node dissection (LNS).After dissection from the relevant data,following -up of 5 -year survival,relapse rate,quality of life and other data for com-parison and statistical analysis were accessed.Results In the observation group,the number of lymphatic vessels in the cleaning,operation time,3 years,the survival rate of 5 years,2 years,3 years and 5 years recurrence rate and survival quality total score comparison is superior to the control group,with significant difference (P <0.05);The amount of bleeding,3 months and 2 years the survival rate,quality of life of each individual score data comparison of the two groups had no significant differences (all P >0.05);The nerve injury rate of the observation group was higher than the control group,there was significant difference (P <0.05).Conclusion Systematic lymph node dissection for treatment of early lung cancer has a thorough cleaning,operation time is short,the short -term survival rate is high,low recurrence rate,high quality of life and other advantages,and has the value of popularization.But there was the amount of bleeding,nerve injury and high rate of defects,it needs to be further perfected.