Company: LI
Filing Date: 2025-08-06
Form Type: 6-K
Source: 0001104659-25-074553
Chunk: 0

Company: Li Auto Inc.
Filing Date: 2025-08-06
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-39407

Li Auto Inc.

(Registrant’s Name)

11 Wenliang Street

Shunyi District, Beijing 101399

People’s Republic of China

(Address of Principal Executive Offices)</div>

Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

<div align='center'>Form 20-FxForm 40-F ¨

EXPLANATORY NOTE</div>

We submitted a monthly return form dated
August6, 2025 with The Stock Exchange of Hong Kong Limited in relation to the movements in our
authorized share capital and issued shares in July 2025. For details, please refer to Exhibit 99.1 to this current report
on Form 6-K.

<div align='center'>EXHIBIT INDEX</div>

| Exhibit No. |     | Description                                                                                                                                          |
| 99.1        |     | Monthly Return for Equity Issuer and Hong Kong Depositary Receipts listed under Chapter 19B of the Exchange Listing Rules on Movements in Securities |

<div align='center'>SIGNATURES</div>

Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Li Auto Inc. |   |                                      |
| By           | : | /s/ Tie Li                           |
| Name         | : | Tie Li                               |
| Title        | : | Director and Chief Financial Officer |

Date: August6,
2025