  Gamma ray diagnostics has been developed in the EAST tokamak recently. Six BGO scintillator detectors are arranged on the down-half cross-section and pointed at the up-half cross-section of plasma, with space resolution about 00 cm and energy range from 0.0 MeV to 0 MeV. Three main gamma ray peaks in the energy spectra have been observed and are identified as the results of nuclear reactions 