A magnetic child safety cabinet lock comprises a magnetic key, a lock belt and a lock body. The lock body comprises a lock shell and a push button. The lock shell is provided with a lock magnet B. The push button is movably arranged in the lock shell. The push button is provided with a lock tooth and a locking mechanism. The locking mechanism is provided with a lock magnet A. One end of the lock belt is fixedly connected with the lock shell, and the other end can move freely. The lock belt is provided with a tooth groove matching with the lock tooth. The lock magnet B and the lock magnet A control the locking mechanism by magnetic force to make the push button locked and fixed.