The invention relates to a prediction method for a bat moth hatching rate. The method is that to-be-measured eggs are cleaned and dried and then sampled; a plurality of culture dishes having the same size are selected; a piece of filter paper is laid on the bottom of the culture dish and then cold boiled water is injected; a sampled egg is placed into one culture dish for hatching; the rest eggs are hatched at the same density; the hatching temperature is 2 to 10 DEG C lower than hatching temperature of the sampled egg; the egg is swept once via a clean brush pen; the egg is swept for times to keep the filter paper humid; microscopic examination is conducted three days after the sampled egg hatches larva; and the hatching rate can be calculated. With hatching temperature differences, hatching rate of each batch of to-be-placed bat moth eggs can be predicted before the bat moth eggs are placed into a culture field. Egg stocking amount in specific culturing space can be determined according to the predicted hatching rate, so the same culturing space can have same or similar population density; the culturing space can be intensively utilized, so culturing space, material and human resource cost can be reduced.