The invention discloses an aerosol inhalation device for the pediatric department. The device comprises a device main body, one end of the device main body is provided with a solution cup containing cavity in the longitudinal direction, the solution cup containing cavity is of a cylindrical hollow structure, a heating metal tube is spirally arranged on the inner wall, an ultrasonic atomization device is installed at the bottom of the solution cup containing cavity, clamping mechanisms are symmetrically arranged at an opening formed in the upper end of the solution cup containing cavity, a liquid medicine cup is installed in the solution cup containing cavity, a sealing cover is in threaded connection with an opening formed in the upper end of the liquid medicine cup, clamping grooves are symmetrically formed in the outer side wall, located at the opening, of the liquid medicine cup, the clamping mechanisms are clamped in the clamping grooves, and a stirring paddle is rotationally installed in the center of a circle of the side, facing the interior of the liquid medicine cup, of the sealing cover. The device is novel in design, simple in structure, convenient to use, convenient to carry and capable of heating atomized liquid medicine, cleaning and disinfection of the liquid medicine cup are conducted conveniently, the use comfort level is improved, and the use requirements of auser are met.