  The Cherenkov light lateral distribution function (LDF) was simulated with
the CORSIKA code, in the energy range (10^13-10^16) eV. This simulation was
performed for conditions and configurations of the Tunka EAS Cherenkov array
for two primary particles (p and Fe). Basing on the simulated results, many
approximated functions are structured for two primary particles and different
zenith angles. This allowed us to reconstruct the EAS events, which is, to
determine the type and energy of the primary particles that produced showers
from signal amplitudes of Cherenkov radiation which measured with Tunka
Cherenkov array experiment. Comparison of the calculated LDF of Cherenkov
radiation with that measured at the Tunka EAS array shows the ability for
identifying of the primary particle that initiated the EAS cascades determining
of its primary energy around the knee region of the cosmic ray spectrum.
