thanks for response
1- did you deactivate normals and vertex color for export ? no , how can I do it ?
2- Did you re-calculate the texture after simplification? yes , but texture has a very bad quality
3- Is it possible that you need to raise the Large Triangle Removal Treshold?sorry i’m beginner in 3d scan and realitycapturing and dont understand your mean 
my steps from import images to export fbx file :
1- import images with +folder or +image in left top of realitycapturing software
2- Align images with >>> align images in 2.process section in workflow tab
3 - cilck on Normal detail in Reconstruction tab on left top
4- click Texture in Reconstruction tab
5 - click mesh in export section and select .fbx format
fbx file size == 185 MB
my steps to reduce the fbx file size :
1- import images with +folder or +image in left top of realitycapturing software
2- Align images with >>> align images in 2.process section in workflow tab
3 - cilck on Normal detail in Reconstruction tab on left top
4- click Texture in Reconstruction tab
5- click simplify tool in tools section and set to 500000
6- click Texture in Reconstruction tab
7 - click mesh in export section and select .fbx format
fbx file size == 85 MB
and texture qulity very bad