The invention relates to a propeller protecting device for an emergency charge boat. The propeller protecting device comprises a connecting rod, wherein a block rod is arranged at the end head of the connecting rod, and sawtooth blades are arranged on two sides of the blocking rod. The protecting device is mounted on the periphery of each of propellers, so that the condition that foreign matters wind the propellers is avoided, and capsizing and injury accidents caused by quick stoppage due to outside force to the propellers are avoided.