Mobile phone side key

The utility model discloses a mobile phone side key, and specifically relates to the technical field of mobile phone side keys, the mobile phone side key comprises a bottom plate and a circuit board used on a mobile phone, the circuit board is located below the bottom plate, two mounting holes are arranged in the bottom plate in a penetrating manner, side keys are arranged in the two mounting holes, the top ends of the side keys penetrate through the mounting holes and extend to the tops of the mounting holes, and the side keys are arranged in the mounting holes. The top end of the side key is sleeved with an elastic rubber sleeve, and the bottom end of the elastic rubber sleeve is fixedly connected with the top of the bottom plate. According to the utility model, through the arrangement of the elastic rubber sleeve, the external impact of the side key can be blocked and protected, the damage of the side key caused by the direct action of the external impact on the external part of the side key is avoided, an