【Aim】 To clarify the spatial pattern and sampling technology of Tuta absoluta eggs in the canopy of tomato plants, thereby providing a basis for the early monitoring and control of this pest. 【Method】 The potted tomato plants (each with 9 compound leaves) in the vegetative growth stage were placed in indoor insect-rearing cages (one plant per cage), and 5-15 pairs of 3-day-old moths were released into each cage. After 3 days, the number of eggs in different parts of the plant canopy was investigated and recorded. The spatial distribution characteristics of eggs in plant canopy were analyzed based on the proportion of eggs, aggregation index, Iwao′s regression method, and Taylor′s power law. The relative variance (RV) and the determination coefficient (R²) were calculated to determine the optimal sampling method. 【Result】 In the canopy, most eggs were on leaves, accounting for 78.0% (54.3% on the adaxial surface and 23.7% on the abaxial surface) of eggs on the whole plant, which was significantly higher than that on petioles (9.1%), stems (6.8%), and apexes (6.1%). The number of eggs on the adaxial surface was significantly higher than that on the abaxial surface, and there was no significant difference in the number of eggs among petioles, stems, and apexes. Regarding the vertical distribution of eggs in the canopy, the number of eggs in the middle part (49.7%) was the highest, which was significantly higher than that in the upper part (29.8%) and lower part (20.5%). The number of eggs on the middle leaves was the highest (48.4%), which was significantly higher than that on the lower leaves (19.2%) and had no significant difference from that on the upper leaves (32.4%). There was no significant difference in the number of eggs between upper and lower leaves, or between petioles, stems, and apexes. In terms of the horizontal distribution of eggs on canopy leaves, the number of eggs in the outer layer (46.2%) was significantly higher than that in the middle layer (31.0%) and the inner layer (22.8%). The results of the aggregation index, Iwao′s regression method (m*=-0.125 5+3.558 3m,r=0.903 6,p＜0.01), and Taylor′s power law (lgS²=0.488 7+1.344 2lgm, r=0.950 3, p＜0.01) all showed that the eggs presented aggregated distribution in the canopy of plants, with repelling between individuals. The reason of the aggregated distribution was positively correlated with density (m) (λ=-0.187 6+4.439 5m,r=0.946 8,p＜0.01). Among several sampling methods, randomly selecting 2-5 leaves from the upper, middle, and lower parts of the plant canopy can be used for field sampling. This method showed the relative variance （RV）(28.9%-29.7%) close to that of whole sampling (30.9%) and the R² of 0.864-0.924, being suitable for field sampling. 【Conclusion】 In the tomato canopy, the eggs of T. absoluta demonstrate aggregated distribution, and the number of eggs on leaves is significantly higher than that on petioles, stems, and apexes. The number of eggs is higher in the middle part than in the upper and lower parts of plants, and higher in the outer layer than in the middle and inner layers of the canopy. The suitable sampling method is randomly selecting more than 2 leaves from each of the upper, middle, and lower parts.