It is the default setting problem of office software, and the following operations should be done (setting the file format supported by office): Take office 20 10 as an example. The operation method is as follows: as shown in the red box below, click the Insert tab, and in the text group, click the object to open the Insert Object dialog box. In the Insert Object dialog box, click Insert Object. Select and click the Adobe Acrobat Document project, and then click OK. At this point, browse to *. Insert the pdf file into the file opening window, and then click Open.