I upload a excel and saved into database, then report such error
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As these Import-Directly-To-DS nodes can be finicky at times, I always recommend utilizing fn!readexcelsheetpaging() from the Excel Tools plugin, create a CDT with the data and utilize the Write to Datastore Entity service to persist. This allows extra points for debugging and data manipulation capabilities.
any refer document of readexelsheetpaging, I don't know what fill inside either
It should be the document, sheet #, and start row #. Have you ran any tests?
If you type the function in your /design expression editor it will show you the function definition, and other information is available from the App Market page for Excel Tools as well.