Аннотация:Backward emitted protons with momentum p > 0.3 GeV/c in interactions of neutrino in the energy range 10-200 GeV with photoemulsion nuclei were investigated. Energy spectrum slope parameter of backward protons was measured to be T0 = 48.9 +/- 7.9 MeV. The A-dependence power index of relative mean yield of backward protons was found to be a = 0.68 +/- 0.12. A drop in the mean yield of backward protons at the four momentum squared over approximately 15 (GeV/c)2 (the neutrino energy over approximately 50 GeV) was observed.