An electrical automatic instrument protection device is disclosed, comprising a pipe, an automatic instrument body is screwed onto the top of the pipe, an installation sleeve A is arranged on the top of the pipe, the bottom of the installation sleeve A is formed with two limit slots A in a left-right symmetrical structure, the limit slots A are provided with a pressure plate A, the upper surface of the pressure plate A is fixed with multiple springs A, the bottom of the installation sleeve A is hinged with the installation sleeve B, the top of the installation sleeve B is provided with a limit slot B, the limit slot B is provided with a pressure plate B, the bottom of the pressure plate B is provided with multiple springs B, the installation sleeve A is screwed onto the protection assembly. The protection assembly of the present utility model is easy to install and remove, and is convenient for the later maintenance and replacement of the automatic instrument body, which greatly improves the maintenance efficiency of the automatic instrument body.