We investigate the resistance and magnetoresistance (MR) of an entangled single-wailed carbon nanotube (SWNT) network. The temperature dependence of conductance is fitted by formula G(T) = G0 exp[-(T0/T)1/2] with T0 = 15.8 K at a wide temperature range from 4 K to 300K. The MR defined by [R(T, H) - R(T, 0)]/R(T, 0) as a function of temperature and magnetic field perpendicular to the tube axis is negative at low temperatures. The MR amplitude increases as the temperature decreases at relative high temperature, but becomes decrease when temperature below 4 K. The results are explained in terms of the coherent hopping of carriers in the presence of a Coulomb gap at low temperature.