分别将excel导入到sas数据集，然后用set语句或者merge语句合并成一个sas数据集，这个用set还是用merge语句视情况定

Also you can consider to:
- produce data sets (using data step, or, import wizard) from xls.;
- use Proc SQL to join them into one. ( joining type (vertically or horizontally ) depends on the data structure of source and your expection).

proc append 过程竖向叠加数据集；merge 横向合并；