With the extensive use of CAD drawing, drawing safety is widely concerned. This study mainly focuses on the operation safety of engineering drawings under AutoCAD environment. A safety management system for engineering drawing is developed with ObjectARX technology. In this system, ARX reactor technology is employed to monitor and control AutoCAD printing and save operations. API HOOK functions are used to intercept the clipboard function in order to change its execution results, and to control the copy and paste operations. In addition, the PrtSc key and Screenshot operations are controlled. The test results show that the system can monitor and manage the user operation, and effectively ensure the integrity of the electronic drawings, at the same time, it does not affect the user's usage habits.