长征二号丁（代号：CZ-2D [24]，简称：长二D）是由中国航天科技集团公司所属上海航天技术研究院研制的常温液体两级运载火箭。

The Long March-2D (code: CZ-2D [24], abbreviated as Chang-2D) is a two-stage liquid launch vehicle developed by the Shanghai Institute of Aerospace Technology, a subsidiary of China Aerospace Science and Technology Corporation.

长征二号丁运载火箭是在长征四号运载火箭的第一、二级基础上研制，起飞推力达300吨，具备地球近地轨道（LEO）和太阳同步轨道（SSO）要求的单星、多星发射能力，运载能力近地轨道4吨，对应700千米太阳同步轨道运载能力为1.3吨，具有高可靠、高安全、低成本、短周期发射等特点。

The Long March-2D carrier rocket is developed on the basis of the first and second stages of the Long March-4 carrier rocket, with a takeoff thrust of 300 tons. It has the single star and multi star launch capabilities required by the Earth's Near Earth Orbit (LEO) and the Sun Synchronous Orbit (SSO), with a launch capacity of 4 tons in the Near Earth Orbit and 1.3 tons in the 700 kilometer Sun Synchronous Orbit. It has the characteristics of high reliability, high safety, low cost, and short cycle launch.

长征二号丁火箭于1990年启动研制，1992年8月9日首次发射返回式卫星获成功。2012年1月，长征二号丁火箭被中国航天科技集团公司授予“金牌火箭”称号 [2]。该火箭是中国现役液体运载火箭在发射场测试发射周期最短的型号。

The Long March-2D rocket was launched in 1990 and successfully launched its first recoverable satellite on August 9, 1992. In January 2012, the Long March 2D rocket was awarded the title of "Gold Medal Rocket" by China Aerospace Science and Technology Corporation. This rocket is the model of China's active liquid carrier rocket with the shortest launch cycle tested at the launch site.

2023年8月31日15时36分，中国在西昌卫星发射中心使用长征二号丁运载火箭，采取一箭三星方式成功发射遥感三十九号卫星 [100]。北京时间2023年10月24日04时03分，中国在西昌卫星发射中心使用长征二号丁运载火箭，成功将遥感三十九号卫星发射升空，卫星顺利进入预定轨道，发射任务获得圆满成功。 [107]2023年11月23日18时00分04秒，我国在西昌卫星发射中心使用长征二号丁运载火箭及远征三号上面级成功将卫星互联网技术试验卫星发射升空，卫星顺利进入预定轨道，发射任务取得圆满成功。

On August 31, 2023, at 15:36, China successfully launched the Remote Sensing Satellite 39 using the Long March-2D carrier rocket at the Xichang Satellite Launch Center, using a one rocket three star approach. At 04:03 Beijing time on October 24, 2023, China successfully launched the Remote Sensing 39 satellite into orbit using the Long March-2D carrier rocket at the Xichang Satellite Launch Center, and the launch mission was a complete success. [107] At 18:00:04 on November 23, 2023, China successfully launched the satellite Internet technology test satellite at the Xichang Satellite Launch Center using the Long March II D carrier rocket and the upper stage of the Expedition III, and the satellite successfully entered the scheduled orbit. The launch mission was a complete success.

2024年5月20日11时06分，我国在太原卫星发射中心使用长征二号丁运载火箭，成功将北京三号C星星座发射升空，4颗卫星顺利进入预定轨道，发射任务获得圆满成功。

At 11:06 am on May 20, 2024, China successfully launched the Beijing 3C constellation using the Long March-2D carrier rocket from the Taiyuan Satellite Launch Center, and four satellites entered the designated orbit. The launch mission was a complete success.