We study the dependence of resistivity p on conducting volume fraction p in CrO2/TiO2 magnetic composite that is composed of acicular half-metallic particles and spherical insulating particles. The measured percolation threshold was determined to be pc = 0.192. It is found that the conductivity exhibits a non-universal critical exponent t = 2.52 ± 0.08, which may be dominantly attributed to microstructure and higher-order hopping in this composite.