Cross-domain element positioning and tree generating method for browser RPA system

The invention discloses a cross-domain element positioning and tree generating method for a browser RPA system, and the method comprises the following steps: loading a plug-in by a browser, injecting a script into a webpage by the plug-in, and performing depth-first traversal to obtain all frames of the current page; enabling the process designer to send instructions to the background, enabling the background to judge the types of the instructions, and adopting different methods to send different instructions to corresponding frames; enabling the script injected with the frame to receive an instruction sent by a background, judging the type of the instruction, and performing corresponding information integration operation on different instructions; wherein the process designer end is used for receiving the data processed by the background, analyzing the data in the json format and displaying the data to a user for editing. According to the method, the function that the browser RPA system locates cross-domain