The selection of high temperature superconducting (HTS) tape and the main parameters of the 120kJ HTS Magnetic Energy Storage (HT- SMES) were presented. To decide the current supply method, the magnetic field characteristics of two connecting types of 30 HTS double pancake coils under 225A current were compared. To satisfy the mechanica/strength requirement, the structural design and mechanical analysis of the cryostat were performed. The simulating results indicate the cryostat with hanging the high temperature supercondu...