Filed electronically with the Securities and Exchange Commission on December 20, 2016

1933 Act File No. 002-13628

1940 Act File No. 811-00043

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	| X |
Pre-Effective Amendment No.	|__|
Post-Effective Amendment No. 225	| X |
and/or
REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940	| X |
Amendment No. 175
Deutsche Investment Trust (Exact Name of Registrant as Specified in Charter)
345 Park Avenue, New York, NY 10154 (Address of Principal Executive Offices) (Zip Code)
Registrant’s Telephone Number, including Area Code:  (617) 295-1000
John Millette Vice President and Secretary One Beacon Street Boston, MA 02108 (Name and Address of Agent for Service)
With a copy to: David A. Sturms, Esq. Vedder Price P.C. 222 North LaSalle Street Chicago, Illinois 60601

It is proposed that this filing will become effective (check appropriate box):

|X |	Immediately upon filing pursuant to paragraph (b)
|__ |	On _____________ pursuant to paragraph (b)
|__|	60 days after filing pursuant to paragraph (a)(1)
|__|	On _____________ pursuant to paragraph (a)(1)
|__|	75 days after filing pursuant to paragraph (a)(2)
|__|	On _____________ pursuant to paragraph (a)(2) of Rule 485
	If appropriate, check the following box:
|__|	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This filing relates solely to the following Fund, a series of the Registrant:

• Deutsche Large Cap Focus Growth Fund – Class A, Class C, Institutional Class and Class S

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this amendment to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of New York and the State of New York on the 8th day of December 2016.

DEUTSCHE INVESTMENT TRUST

By: /s/Brian E. Binder

     Brian E. Binder*

      President

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

SIGNATURE	TITLE		DATE
/s/Brian E. Binder
Brian E. Binder*		President		December 8, 2016
/s/ Paul H. Schubert
Paul H. Schubert		Chief Financial Officer and Treasurer		December 8, 2016
/s/John W. Ballantine
John W. Ballantine*		Trustee		December 8, 2016
/s/Henry P. Becton, Jr.
Henry P. Becton, Jr.*		Trustee		December 8, 2016
/s/Dawn-Marie Driscoll
Dawn-Marie Driscoll*		Trustee		December 8, 2016
/s/Keith R. Fox
Keith R. Fox*		Trustee		December 8, 2016
/s/Paul K. Freeman
Paul K. Freeman*		Trustee		December 8, 2016
/s/Kenneth C. Froewiss
Kenneth C. Froewiss*		Chairperson and Trustee		December 8, 2016
/s/Richard J. Herring
Richard J. Herring*		Trustee		December 8, 2016
/s/William McClayton
William McClayton*		Vice Chairperson and Trustee		December 8, 2016
/s/Rebecca W. Rimel
Rebecca W. Rimel*		Trustee		December 8, 2016
/s/William N. Searcy, Jr.
William N. Searcy, Jr.*		Trustee		December 8, 2016
/s/Jean Gleason Stromberg
Jean Gleason Stromberg*		Trustee		December 8, 2016

*By:

/s/ Caroline Pearson

Caroline Pearson**

Chief Legal Officer

** Attorney-in-fact pursuant to the powers of attorney that are incorporated herein by reference to Post-Effective Amendment No. 204, as filed on August 22, 2014 to the Registration Statement.

EXHIBIT INDEX

Index No.	Description of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase