The invention provides an automatic-adapting protocol converter. The defects that in the prior art, a traditional protocol converter is low in conversion efficiency, and can not guarantee the accuracy of data are overcome. The automatic-adapting protocol converter comprises a shell, an embedded micro-processing chip, a power module, a communication interface module, a multi-protocol adapting conversion module, a short message alarm module, an equipment abnormality self-recovery module and a protocol data output module are arranged inside the shell, and the embedded micro-processing chip is connected with the power module, the communication interface module, the multi-protocol adapting conversion module, the short message alarm module, the equipment abnormality self-recovery module and the protocol data output module. Automatic adapting of multiple network communication connection modes, multiple protocol automatic-adapting conversion and program abnormality self-recovery are achieved, zero configuration is achieved for a user in the using process, data security can be guaranteed, and the protocol conversion efficiency can be improved.