Recently the exotic event observed at the Yunnan Cosmic Ray Station (Y
CRS) is reinterpreted as a neutral supersymmetric (SUSY) particle bomb
arding on proton to produce a charged SUSY particle which decays after
wards. The kinematics analysis determines the lower bounds of its mass
and Lifetime. Taking this bounds as inputs and following recent Liter
atures to assume the scalar neutrino (sneutrino) as the main constitue
nt of the cold SUSY dark matter, rye calculate the flux of sneutrino a
t the earth detector in terms of the standard rate equation of cosmic
matter.