[Aim] In this paper, the spatial pattern of Lissorkoptrus oryzophilus adult populations were examined through the use of different sampling techniques and timing of rice planting in the shallow hilly rice area of Southwest Sichuan Province. The results aimed to provide a scientific basis for obtaining accurate survey data of rice water weevil and formulating effective comprehensive control measures. [Method] The growth periods of rice in two experimental fields were staggered by adjusting their planting time. The spatial pattern of L. oryzophilus adult populations and the effect of rice growth period on the spatial aggregation characteristics were analyzed by the methods of aggregation index, regression model and frequency chi square test. The sequential sampling technique and double diagonal sampling method were also tested in the field. [Result] The average density of L. oryzophilus adults in different fields was 0.48-5.83 heads/clump, and the population density at the tillering stage was significantly higher than that in heading stage. The adult populations of L. oryzophilus had an aggregated spatial pattern and fit to negative binomial distribution in rice fields of different growth periods. The basic component of distribution was individual group, which attracted each other, and the aggregation intensity increased with the increase of population density. The aggregation was associated with environmental factors at low population density, while at high population density, aggregation was associated with the habit of the pest and environmental factors. The double diagonal sampling method was the best method for field sampling of L. oryzophilus adults. The Iwao's sequential sampling model was T_1(n),T_0(n)=n±1.96√2.286n, combined with Kuno's sequential sampling figure, the multiple sequential sampling figure for field sampling was established, under control threshold of L. oryzophilusl adults with 1 head/clump. [Conclusion] The adult populations of L. oryzophilus had an aggregated spatial pattern and fit to negative binomial distribution in rice fields of different growth period, and the population density in tillering stage was significantly higher than that in heading stage. The double diagonal sampling method was the best method for field sampling of L. oryzophilus adults.