A molecularly imprinted photocurrent chemical sensor was fabricated by using TiO2 film for the detection of carbofuran.Effect of doping modification on photocatalytic efficiency of TiO2 was studied.The results showed that the molecularly imprinted membrane of Au doped TiO2 had a good detection effect on the template molecule carbofuran.The experimental conditions such as film thickness and adsorption time were optimized.The experimental results showed that the concentrations of carbofuran had a good liner relationship with photocurrent in the range of 1.00×10-9-2.20×10-7 mol/L under the optimal experimental conditions，and the detection limit(S/N=3) was 1.10×10-10 mol/L.The sensor has demonstrated outstanding features such as excellent sensitivity，selectivity and stability.The determination of carbofuran in water was carried out by using the sensor，and the recoveries were in the range of 98.7%-104.0%.