When working with the word file, you can insert the Excel file as an attachment or insert the content as a whole table into the word file.
To insert the Excel file as an attachment, one of the common ways is to right-click on the Excel file and select "copy" from the dialog box, then "paste" to the word file, the same procedure as inserting PDF to the word file as an attachment.
Alternatively, you can follow the steps below to insert the Excel file either as an attachment or as a whole table.
Step 1: Click the "Insert" tab from the ribbon;
Step 2: Click the "Object" command from the "Text" area;
Step 3: In the "Object" window, browse to the file location;
Step 4: Click "OK" and the Excel contents will display as a whole table in the word file.
To insert the Excel as an attachment, you need to check the box of "Display as icon".
If you only want to copy and paste a part of the worksheet, please refer to How to Paste an Excel Data in Word.