The China Seismo-Electromagnetic Satellite (CSES) will investigate ionomagnetospheric disturbance and will monitor the temporal stability of the inner Van Allen radiation belts. In particular the mission aims at confirming the existences of a temporal correlation between the occurrence of earthquakes and the observation of electromagnetic disturbances, plasma fluctuations and anomalous fluxes of high-energy particles precipitating from the inner Van Allen belt in space. The high energy detector of High Energy Particle Package (HEPP-H) is a payload of CSES and is designed for detecting electrons (2-50MeV) and proton in earth 500km orbit. CSES has been launched in the February of 2018. In this paper, the instrumentation and development of the HEPP-H calorimeter is described. The calibration with beam particles (electrons and proton) is discussed in detail.