The invention relates to the field of public safety, and discloses a public charging device. The public charging device comprises a shell, a power supply, charging interfaces, charging lines, a controller, antitheft chambers and operation panels; and the power supply is disposed in the shell, one end of each charging interface is connected with the power supply, the other end of each charging interface is connected with one end of the corresponding charging line, the other end of each charging line is provided with a joint matching a mobile phone charging port, one end, provided with the corresponding joint, of each charging line goes out of the shell and goes into the corresponding antitheft chamber, the controller receives input information of the operation panels, and the controller controls the antitheft chambers to be opened and closed. The public charging device enables a mobile phone to be placed in an antitheft area and to be charged, the mobile phone is prevented from being stolen in a public place, and safety of personal belongings is improved.