1. 1. Clarify the scope of work: divide the whole basement construction drawing according to different areas or functions, such as dividing the basement into different rooms, floors or systems, and determine everyone's responsibility area.

2. Secondly, assign tasks: according to the expertise and ability of team members, assign each field or function to the corresponding members, ensure that everyone knows what they are responsible for, and clarify the task requirements and time limit.

3. Then draw the basic map: Everyone can draw the basic map of the area or function he is responsible for first, and indicate the specific size, coordinates and details on the map. You can use computer-aided design software or traditional drawing tools.

4. Then integrate the drawings: after each member completes the drawings, integrate the drawings of various areas or functions, stack the drawings together with CAD software, or scan and collage the paper drawings.

5. Finally, communication and coordination: communicate and coordinate the integrated drawings, so that team members can check the consistency and correctness of the drawings to ensure the connection and coordination of all parts, and can make modifications and adjustments as needed.