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This study aims to examine the achievement and improvement of mathematical proficiency and disposition of vocational students using multi-representation approach. The method used in this study is a quasi-experimental method. The population in this study were all students of class XI in one of the vocational schools in the city of Cimahi, while the sample was chosen by two classes, 1 control class that used the usual approach, one class again, the experimental class using a multi-representation approach. The instruments used were in a set of mathematical proficiency and non-test in a set of a questionnaire to measure students mathematical dispositions. All data processing used SPSS. Based on the results of data processing, it was concluded that mathematical proficiency and mathematical disposition of vocational students whose learning using a multi-representation approach were better than the usual approach. Keywords: mathematical proficiency