The relationships between the magnetic field dependence of the magnetoresistance effect and the film preparation conditions for composition-modulated Ni-Co-Cu films produced by the pulse control electrodeposition method were investigated. It was possible to produce multilayer films containing more than three layers composed of non-magnetic and ferromagnetic layers having different magnetic properties. A highly sensitive change of the electric resistance was obtained at a low magnetic field. The MR ratio observed in the film has maximum values of about 6% at 300K.