Crawlers are automated programs that collect information and are increasingly used in a wide range of fields. Python have been widely used in medical imaging, which mainly involves image processing and artificial intelligence, due to the rapid iteration capability of Python. In order to ensure the efficiency of program execution and reduce the pressure on computer storage caused by the required data for training models, an asynchronous design program that can significantly improve the efficiency of program execution is adopted, and transient files are used to store data. The results showed that the efficiency of asynchronous programs and transient storage programs were 4.722 times and 1.433 times higher than that of single threads, respectively. Using crawlers in medical imaging model training can reduce the requirements for computer storage performance.