The era of widespread ascariasis has passed, and the current ascariasis epidemic is no longer not widespread, as sanitary conditions have now improved considerably, and the ability to manage fecal matter and water sources has increased significantly. However, ascariasis still has a certain distribution, mainly in areas where living conditions are not particularly good. The reason for the widespread prevalence in these areas is that Ascaris lumbricoides is relatively viable and has a high egg production capacity, with one female worm laying 240,000 eggs per day, so it has a relatively high reproductive capacity. Also, roundworm eggs are relatively resistant to the outside environment and can survive outside for a year, or even up to 10 years or more. They can also survive in harsher environments, such as salt water or chemicals such as strong acids, and roundworm eggs can develop into stages with infected roundworm eggs in the outside world. And the means of transmission is relatively wide, and the hygiene habits in areas with a high prevalence of ascariasis are not good, which will have some relationship with the local economic conditions.