i was asking about an original node named: FamilyDocument.Parameters how it works
thanks
This node will extract all the parameters from a provided family document.
I recommend you use it in the family environment on the active document at first, rather than the project environment where you need to extract the document from each loaded family.
From there you can use the FamilyParameter (and other nodes from the classes it inherits). Specifically look here:
Ok Big Thanks for that but how can i export all parameters for a family to Excel so i can fill them and import it back again in dynamo ? 
Are you working in a project or family?