Filed electronically with the Securities and Exchange Commission on February 22, 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. 218	| X |
and/or
REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940	| X |
Amendment No. 168
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)(3) 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 Funds, each a series of the Registrant:

• Deutsche Capital Growth Fund — Class A, Class B, Class C, Class R, Class R6, Institutional Class, and Class S
• Deutsche Core Equity Fund — Class A, Class B, Class C, Class R, Class R6, Institutional Class, and Class S
• Deutsche Mid Cap Growth Fund — Class A, Class B, Class C, Institutional Class, and Class S
• Deutsche Small Cap Core Fund — Class A, Class B, Class C, and Class S
• Deutsche Small Cap Growth Fund — Class A, Class B, Class C, Class R, Class R6, Institutional Class, and Class S
• Deutsche CROCI® U.S. Fund — Class A, Class C, Class R6, 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 11th day of February 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		February 11, 2016
/s/Paul H. Schubert
Paul H. Schubert		Chief Financial Officer and Treasurer		February 11, 2016
/s/John W. Ballantine
John W. Ballantine*		Trustee		February 11, 2016
/s/Henry P. Becton, Jr.
Henry P. Becton, Jr.*		Trustee		February 11, 2016
/s/Dawn-Marie Driscoll
Dawn-Marie Driscoll*		Trustee		February 11, 2016
/s/Keith R. Fox
Keith R. Fox*		Trustee		February 11, 2016
/s/Paul K. Freeman
Paul K. Freeman*		Trustee		February 11, 2016
/s/Kenneth C. Froewiss
Kenneth C. Froewiss*		Chairperson and Trustee		February 11, 2016
/s/Richard J. Herring
Richard J. Herring*		Trustee		February 11, 2016
/s/William McClayton
William McClayton*		Vice Chairperson and Trustee		February 11, 2016
/s/Rebecca W. Rimel
Rebecca W. Rimel*		Trustee		February 11, 2016
/s/William N. Searcy, Jr.
William N. Searcy, Jr.*		Trustee		February 11, 2016

/s/Jean Gleason Stromberg
Jean Gleason Stromberg*	Trustee	February 11, 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