The invention discloses a self-heating floor which comprises a floor main body and an electrothermal component, wherein the floor main body comprises an upper part main body and a bottom plate, the electrothermal component comprises a circuit device, a first mounting seat and a second mounting seat, the first mounting seat and second mounting seat of the electrothermal component are used as powersupply plug connectors on the left and right sides of the floor main body, the circuit device of the electrothermal component and the corresponding parts of the first mounting seat and the second mounting seat are arranged between the upper part main body and the bottom plate; the first mounting seat is a component of which the socket part is hermetically plugged in and electrically connected with that of the second mounting seat of the electrothermal component of the adjacent self-heating floor when in use; and the second mounting seat is a component of which the socket part is hermetically plugged in and electrically connected with that of the first mounting seat of the electrothermal component of the adjacent self-heating floor. The self-heating floor and the electrothermal component provided by the invention are simple in structure and convenient for realization of industrial production.