The invention relates to a rescue-boat horizontal moving, hanging and placing device. The rescue-boat horizontal moving, hanging and placing device is characterized by comprising two inner main hanging arms, two outer main hanging arms, an inner main hanging arm rotating shaft, an outer main hanging arm rotating shaft, a hanging arm rotating shaft, a hydraulic cylinder, a guide rail, a guide rail rotating shaft, a transmission rod and a transmission rod rotating shaft. One ends of the two inner main hanging arms are connected through the inner main hanging arm rotating shaft; one ends of the two outer main hanging arms are connected through the outer main hanging arm rotating shaft, and the other ends of the two inner main hanging arms are connected with the other ends of the two corresponding outer main hanging arms through the hanging arm rotating shaft; the guide rail rotating shaft is installed on the guide rail; one end of the hydraulic cylinder is connected with the outer main hanging arm rotating shaft, and the other end of the hydraulic cylinder is connected with the guide rail rotating shaft; two transmission rod rotating shafts are arranged on the two outer main hanging arms respectively, and are connected with one end of a transmission rod, and the other end of the transmission rod is connected to the guide rail rotating shaft. The rescue-boat horizontal moving, hanging and placing device has the advantages of being capable of conveniently conveying a rescue boat to the interior of a boat horizontally or pushing the rescue boat out of the boat horizontally and saving time and labor.