Abstract: Chickpea protein was extracted from Kabuli chickpea seed powder produced in Yunnan by using alkali soluble and acid sinking method. The extracting conditions were optimized by single-factor experiment and response surface methodology. Protein putity was examined by using Semi-micro Kjeldahl Method in extracted chickpea protein powder. Results showed the optimum conditions were as follows:the ratio of water to material was 12:1 mL/g, alkali-soluble pH was 10, alkali-soluble time was 120 min and under these optimized conditions, the yield of chickpea protein reached 12.66%. Furthermore, the protein purity in chickpea extracted protein powder was 77.82%, better than the known methods, which indicated that the higher purity of the extracted chickpea protein powder could be obtained by the optimized methods in this study.