Abstract: Objective:To analyse the cataract "heavy engineering" groups implementing technique through small incision modern extracapsular cataract out iol implantation of low vision after the main reason.Methods:Retrospective analysis in October 2011 to implement "the millions of poor cataract surgery patients engineering" cataract patients 189 patients(192 eyes),mydriatic,anesthesia,open after eyelid,small incision cataract use technique of modern extracapsular cataract out iol implantation,the postoperative observation correct vision and complications.Results:Postoperative corrected visual cuity was significantly higher than the 87.83% ZhengChangLv preoperative 0%,low vision rate was significantly lower than the control group,and the comparison of statistics data has significant difference(P<0.05).23 cases(24 eyes) of low vision after the patients,surgical complications occurred in 12 cases(52.17%),preoperative has original the complications in 5 patients(21.74%),and the complications and preoperative complications 6 cases(26.09%).Conclusion:Intraoperative complications and preoperative complications is cataract "surgery project" of low vision after the operation of the main factors happen,clinical should actively know patients history,complications,formulate rational operation plan and prognosis,and at the same time should be paid attention to in this technique,avoid a intraoperatie complications.