Abstract: ［Abstract］Objective　To investigate the curative effect of the treatment for the distal humeral shaft fracture with double steel plate internal fixation. Methods A total of 60 individuals who were humeral shaft fractures were included from March 2009 to April 2014 in the second people's hospital of Yunnan province. 28 of them were treated using double plate fixation（group A）and 32 of them were treated using single-plate treatment (group B). Blood loss, hospital stay, postoperative drainage, healing time and Mayo elbow performance score were compared between the two groups. Results（1）Blood loss, hospital stay and postoperative drainage showed no differences between two groups. However, the healing time between these two groups showed difference（P < 0.05）. （2）MEPS score results showed a significantly difference in the excellent rate of patients between groups A and B（96.4% and 75%，respectively，P < 0.05）. Conclusion The double plate fixation and single plate fixation for treatment of humeral shaft fracture showed no differences in operation time，blood loss，postoperative drainage and hospital stay. However，the double plate fixation showed a shorter healing time and better efficacy. Thus，the double plate fixation of humeral shaft fracture can contribute to obtain the rigid internal fixation，early functional exercise and better clinical efficacy.