I saw an MSc in Bussines and Economics that offers Finance and Accounting specialization in TU Dortmund.I saw on the CHE rankings that TU Dortmund is quiet high in Masters in University in Economics Sciences.Does anybody know anything about this Uni for the finance sector? I would like to get into investment banking,pe, or even big4 firms after this Master.Thank you.

LinkedIn is really your friend. It's not very likely that this would lead to PE, because they will hire people who are better networked and are in more selective programmes. 

Looking at MSc graduates of the TUD, using LinkedIn, it seems that the school does not place well into finance and accounting. You can do this analysis yourself very easily. 

I am not sure why you think that programme is well ranked by the CHE. I looked at the CHE ranking for VWL MSc and TUD doesn't seem to be above average https://www.daad.de/en/study-and-research-in-germany/plan-your-studies/che-university-ranking/?che-subject-id=27&che-university-type-id=&che-degree-id=4&che-a=ranking-list&che-indicator%5B%5D=693&che-indicator%5B%5D=458&che-indicator%5B%5D=457&che-indicator%5B%5D=34&che-indicator%5B%5D=35&che-sort=458 

[Edited by Duncan on Jan 23, 2021]

I looked at the CHE for the MSc in BWL and, again, TUD is not above average there https://www.daad.de/en/study-and-research-in-germany/plan-your-studies/che-university-ranking/?che-subject-id=24&che-university-type-id=1&che-degree-id=4&che-a=ranking-list&che-indicator%5B%5D=693&che-indicator%5B%5D=458&che-indicator%5B%5D=457&che-indicator%5B%5D=34&che-indicator%5B%5D=35&che-sort=458 

My only places of study that I can go is Frankfurt and  Dortmund. I am trying to find a finance related MSc in these places .which do you thing is the best ?

Which will most improve your German language skills? 

TU Dortmund-MSc in Finance and Accounting is in German and Goethe Frankfurt-MSc in Money and Finance is in English.

TU Dortmund works better. 

But I see that most of the people that get into investment banking ,pe,vc obtain English taught programmes.

They already speak German though, and are (mostly) Germans. 

[Edited by Duncan on Jan 24, 2021]

What if i obtain a MSc from Frankfurt School or Goethe in ENGLISH after i get my C1-Zertifikat ?

I think we have covered this before. C1 won't give you the functional vocabulary or acculturation.