The invention discloses an air suction type heat radiation mechanism, and relates to the technical field of elevator tools. An air suction fan is mounted in a shell. An air outlet filter screen is arranged on the lower side of the air suction fan. Mounting racks are mounted at the two ends of the shell. An activated carbon adsorption net is arranged on the upper side of the air suction fan. A main air inlet pipeline is connected to the upper end of the shell. An air inlet filter screen is arranged at the inner upper end of the main air inlet pipeline. Auxiliary air channels are arranged at the two ends of the lower side of the main air inlet pipeline and communicate with the main air inlet pipeline. An auxiliary fan is arranged in each auxiliary air channel. According to the air suction type heat radiation mechanism, rapid heat radiation can be achieved conveniently, heat radiation performance is improved through the auxiliary fans, the efficiency is high, and use is convenient.