The invention discloses a simulation debugging device for debugging the security check state of a device. The simulation debugging device comprises a simulation chip, a management module and an integrated development environment module installed on a user computer. A reset module, a security check module and a PC pointer register are arranged in the simulation chip, a security check state registeris arranged in the security check module, and a security check information memory is arranged in the management module. The management module is connected with the PC pointer register through a firstregister reading bus, is connected with the security check state register through a second register reading bus, is connected with the security check module through a reset trigger signal line and isconnected with the reset module through a reset control signal line. And the management module is connected with the integrated development environment module through a debugging channel. The invention further discloses a simulation debugging method. According to the present invention, the debugging efficiency of the user program codes and the overall debugging efficiency under the equipment field environment can be effectively improved.