科尔沁左翼后旗地处科尔沁沙地与松辽平原交接地带，除东邻东、西辽河交汇处有占总面积不到3%的冲积平原处，其余全部为沙坨草甸交错、沙丘连绵，以沙地沙丘为主要特征。境内海拔最高为308.4米，最低为88.5米，呈现由西南向东北的岗状沙丘，再向东南冲积平原倾斜的地形。

科左后旗是清代著名爱国将领僧格林沁的故乡，境内有被誉为“沙地明珠”、“天然植物园”的AAAA级国家级自然保护区——大青沟，另外还有吐尔基山辽代千年古墓、阿古拉双合尔山等名胜古迹。

Keerqinzuoyihou Qi (Keerqin Left Back Banner) is in the south of Tongliao. In short, it is called Ke Zuo Hou Qi. Its neighbors include Shuangliao of Jijin Province in the northeast, Zhangwu, Kangping and Changtu of Liaoning Province in the east and south, Kulun Qi, Naiman Qi, Kailu Town, Keerqin District and Ke Zuo Zhong Qi in the east and north. Ke Zuo Hou Qi covers an area of 1,1476 square kilometers

and has a population of 400,000 people (Year 2014). There are 24 towns in total. 

Ke Zuo Hou Qi is in between the Keerqin Sandy Land and Songliao Plain. Only 3% of the area is flood plain, located in the conjuncture of East Liao River and West Liao River. All the rest are landscape characterized by mixture of sand dunes and grasslands. The highest point is 308.4m and lowest point is 88.5m.

Ke Zuo Hou Qi is the hometown of the famous general in Qing Dynasty, Zenggelinqin. The most famous tourist sites include Da Qing Go, also known as the Pearl of Sandy Land, the Liao Tomb in Tuerji Moutain and Shuangheer Mountain in Agula Town.