The invention discloses a detection method of surface drying time of a normal-temperature cured silicone rubber paint for insulators. The detection method comprises the steps of taking the normal-temperature cured silicone rubber paint, pouring into an accommodating utensil and initially weighing in time; setting an automatic weighing period and an automatic weighing interval and obtaining a plurality of groups of weighing data; performing fitting treatment on the obtained plurality of groups of data to obtain a logarithmic curve tending to be stable, wherein a horizontal coordinate is time, and a vertical coordinate is the weight of the accommodating utensil where the normal-temperature curve silicone rubber paint is accommodated; solving a slope of the fitting logarithmic curve, wherein time corresponding to the set slope is the surface drying time. By means of a quantitative method, interference of environmental factors can be effectively eliminated, and accuracy of measurement results is improved.