The utility model has a memory write protection circuit, comprising a system reset circuit, a system MCU and a write protection control circuit. The memory read/write control port is respectively connected with the system reset circuit and the system MCU through a write protection control circuit, and the system reset circuit and the system MCU are used for Output control signals. The write protection circuit is used to logically operate the two control signals, and the output signal is used as the write protection signal of the memory, which ensures that the memory is also in the write protection state at the moment of power-on, which can better ensure the data in the memory. Not erased, improving system reliability. The specific circuit is shown below. 
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