Although using IP agents for global data crawling can improve efficiency and accuracy, there are also some advantages and disadvantages. Its main advantage is that it can hide the real IP address, improve the efficiency and accuracy of crawling, while its disadvantage is that it requires additional proxy servers, which increases the complexity of the network architecture. In order to improve efficiency and accuracy, we need to pay attention to the following points: first, choose a high-speed and stable proxy server to ensure the efficiency and accuracy of data retrieval; Secondly, it is necessary to regularly check the status of the proxy server and replace any failed proxy servers in a timely manner; Finally, appropriate parsing methods and tools should be selected based on the characteristics of the target website to avoid data omissions and errors.