The invention discloses a correction method of a measurement result of surface hydrophobicity of algae-coated silicon rubber. The correction method comprises the following steps: S1, measuring and determining a change rate of algae cell density in a measurement period under a given environment factor; S2, determining cumulative impacts of change of the algae cell density on the surface hydrophobicity of silicon rubber in the measurement period; S3, calculating on the basis of original hydrophobic angle data according to the cumulative impacts, thus obtaining a finally corrected hydrophobic angle. According to the correction method disclosed by the invention, deviation of the hydrophobic angle caused by physiological change of microorganism contamination generated when the hydrophobicity isquantitatively tested on the surface of an algae-coated insulator can be corrected, and the accuracy of the measurement result of the hydrophobicity is ensured.