The invention discloses a mobile steel cylinder intelligent heating and filling device. The mobile steel cylinder intelligent heating and filling device comprises a base, a vertical supporting frame, an inclined supporting plate, an arc-shaped support and a control system, wherein the vertical supporting frame and the inclined supporting plate are fixed to the base; the arc-shaped support is fixed to the inclined supporting plate; the control system comprises a controller, a temperature senor, a plurality of heaters and a weighing sensor. The plurality of heaters are arranged on the upper surface of the arc-shaped support. The weighing sensor is arranged on the arc-shaped support and used for collecting weight information of a steel cylinder. The controller is used for receiving information collected by the temperature sensor and the weighing sensor and is used for automatically selecting the number of the heaters put into use and controlling starting and stopping of the heaters put into use according to the information. The mobile steel cylinder intelligent heating and filling device is simple in structure, convenient to use, capable of automatically selecting the number of the heaters put into use according to the weight of the steel cylinder and capable of monitoring the temperature of the steel cylinder in real time and adjusting the temperature of the steel cylinder through the heaters.