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In order to distinguish different sparse degrees of top, middle and bottom canopy in orchard, canopy information acquisition method of fruit trees was proposed based on fused sensor array. First of all, the wireless acquired system was designed, which was used to collect canopy width information in orchard. And in order to verify sensor ability to recognize objects in motion, the dynamic recognition capability of six non-contact distance sensors was compared and analyzed. Secondly, laser sensors and ultrasonic sensors array which were filtrated to collect canopy information was used, which incorporated sparse degree and width of top, middle and bottom canopy in three kinds of orchard. Finally, fused sensor array that was suitable for three kinds of orchard was selected. According to Box-Benhnken center combination test method, the orthogonal experiment was designed, including three factors and three levels. And appropriate ranging scheme was selected by response surface experiments and the results of testing were statistically analyzed. The significance level of the overall measurement accuracy of fruit trees from large to small was ranging scheme,car-body speed and orchard type in turn.When vehicle speed was 0.3~0.5m/s, using ultrasonic sensor array to collect canopy information of orchard, the relative error was 14.70%~20.04%. When laser sensor array was used to collect canopy information of orchard, its relative error was 9.13%~16.02%. And when fused sensor array was used for three orchards, its relative error was 4.2%~10.24%. Therefore, the fused sensor array scheme was more accurate than the single sensor array, and it was more suitable for the orchard variable spray operation.