The invention discloses a portable power adapter with small occupied space, beautiful and coordinated appearance, convenient retractable and portable power adapter, which comprises a casing, power input and output lines (51, 53), power conversion circuit (6), and wire locking mechanism , the center of the housing is provided with a hollow stepped shaft column (2), the outer wall of the shaft column (2) is provided with an annular partition (22), and the upper and lower sides of the annular partition (22) are provided with upper and lower turntables ( 31, 32), the upper and lower turntables (31, 32) are respectively provided with outer conductive layers (301, 302) on the stepped cylindrical surfaces, and the inner conductive layers (201, 202) are arranged on the shaft column (2), and the power input , output lines (51, 53) are connected with the outer conductive layer (301, 302) respectively, the input and output ends of the power conversion circuit (6) are connected with the inner conductive layer (201, 202) respectively, and the upper and lower turntables ( 31,32) and the shaft post (2) are connected with upper and lower torsion springs (41,42), and the power supply input and output lines (51,53) are coiled around the peripheries of the upper and lower rotating disks (31,32) respectively.