[Objective] The landscape change of Mu Us sandy land in the past 100 years was analyzed in order to provide basis for the study of ecological management in this area.[Methods] Through satellite image interpretation and field investigation

we found out the shooting site of four photos taken by Robert Sterling Clark expedition in the Mu Us sandy land in 1908

and rephotographed the photos of the past hundred years in 2019

and then compared the changes of ecological factors in the new and old photos.[Results] More than one hundred years ago

Mu Us sandy land was sparsely covered with vegetation

and the sandstorm was rampant. After the founding of the People's Republic of China

the local government organized the masses to carry out sand remediation. After decades of treatments

mobile sand dunes were fixed

regional vegetation was effectively restored

and soil erosion was effectively controlled.[Conclusion] Due to the fragile ecology of Mu Us sandy land

there is still the risk of desertification in the sand land that has been treated. It is necessary to integrate the treatment of Mu Us sandy land into the overall plan for ecological protection and high-quality development of the Yellow River basin

so as to make overall coordination and comprehensive treatment.