Objective To explore the significance of quality control after clinical laboratory analysis .Methods A total of 450 pieces of unqualified testing reports were collected from the Department of Clinical Laboratory from January 2012 to June 2014 and reasons causing unqualified testing reports were analyzed .Results In all 450 pieces of unqualified testing reports ,testing results of 169 pieces were inconsistent with results of clinical diagnosis ,accounted for 37 .6% ;149 pieces with missing or indirect inspection i‐tems ,accounted for 33 .1% ;62 pieces did not indicate staff or department sending specimens ,accounted for 13 .8% ;results of 36 pieces reached the critical value but without re‐inspection or did not indicate the re‐inspection ,accounted for 8 .0% ;18 pieces did not clarify specimens with lipid turbidity or jaundice and so on ,accounted for 4 .0% ;16 pieces marked with wrong sample types ,accoun‐ted for 3 .6% .Conclusion It is necessary to conduct quality control after clinical laboratory analysis before delivering report ,stand‐ardize operating procedures ,check every report seriously ,make clear responsibility and improve awareness of responsibility ,in order to provide a qualified testing report for clinical practice .