Hot air comb capable of changing forms

The invention relates to the technical field of hairdressing and shaping tools, in particular to a form-changeable hot air comb which comprises a machine body, a handle and at least two replaceable air heads. The machine body comprises a motor, fan blades, a heating wire, an inner shell and an outer shell, the interior of the inner shell is hollow to form an air duct, an air outlet and an air inlet are formed in the two ends of the air duct respectively, the motor is fixed to the air duct and arranged on the side close to the air inlet, the fan blades are connected with an output shaft of the motor, and the heating wire is connected with the output shaft of the motor. The heating wire is fixed to the air channel and arranged on the side close to the air outlet, the outer shell is arranged outside the inner shell in a sleeving mode, a first connecting part is arranged at the end, close to the air inlet, of the outer shell, a second connecting part is arranged on the side face of the outer shell, and the handle