Abstract: By analyzing the risk of the spacecraft developing evaluation index， a risk control model was built based on comprehensive weight TOPSIS. In this model， the subject and the object weight were calculated by AHP and entropy-weight method. The linear programming was used to count the comprehensive weight. And TOPSIS method was optimized by using “vertical plane projection method” to substitute existing opposite continental distance， resulting in improving the precision of evaluate. The risk evaluated target was clustered， and the different sort target system was set up， resulting in predigesting the process of the operation. In the end， the best scheme was selected by combining the example of spacecraft development control. The result showed the feasibility of the developed method.

Key words: spacecraft development, C-TOPSIS, clustering, entropy power process, risk control