Mobile phone plug device for mobile phone

A mobile phone plug device for a mobile phone (10) comprises a flat inserting part (8), a telescopic device, a shell body part (5) and a wire cable (1). The flat inserting part (8) can be inserted into a mobile phone slot and is provided with a longitudinally-extending contact strip (13) and two longitudinally-extending through type longitudinal long sliding grooves (12). The two through type longitudinal long sliding grooves (12) are through in the thickness direction of the flat inserting part (8). The flat inserting part (8) is provided with end cap ends (9) on the right sides of the two through type longitudinal long sliding grooves (12) in the longitudinal direction.