This paper did an evaluation of the location accuracy of the Mapping Satellite-1 Three-Line-Array（TLA） image with and without control points.The experiment data involves several test blocks and a lot of field surveyed GPS control points.The result showed that the horizontal accuracy of TLA image can reach 12 m and the height accuracy can reach 10 m without GCPs.When using GCPs

the accuracy can reach eight meters and three meters respectively which can satisfy the accuracy requirement of 1:50000 mapping.