In the development of aerospace in the new era, many countries take deep space exploration as one of the development directions. Mars rover is particularly important because of its higher scientific research value. This design combines the modular concept with the rover, so that it can have the functions of repairing parts, replacing parts, etc., and meet the requirements of technological innovation, replacement and upgrading of corresponding parts, and integration and planning of various equipment or instruments, making it a sub-module to facilitate its installation and management. When manned spaceflight to Mars becomes possible, the modular Mars exploration vehicle can still meet mission needs by replacing modules. Through the modular concept, the rover can meet different scientific research needs in different exploration stages and reduce the cost of deep space exploration.