The reasonable seismic intensity index of recycled concrete structure is the mapping criterion to predict and evaluate its seismic response. Based on 15 structures of three building heights and five recycled aggregate replacement rates， 120 ground motion records are selected to do time history analysis. The correlation， efficiency and sufficiency of 28 seismic intensity indexes and four key engineering demand parameters are evaluated， considering the structure height， replacement rate of recycled aggregate， earthquake source mechanism and whether the pulse ground motion. There is a strong correlation between spectral intensity index and engineering demand parameters. In terms of the changes of the structure height and replacement rate， the correlation between different seismic intensity indexes and engineering demand parameters is obviously different. The spectral velocity is the most correlated seismic intensity index with four engineering demand parameters. The correlation coefficient is affected by the replacement rate of the recycled aggregate， earthquake source mechanism and whether pulse ground motion. The spectral intensity indexes are effective and sufficient to characterize the engineering demand parameters.