The invention relates to a multifunctional head rest for a public bath. The multifunctional head rest for the public bath comprises a head rest plate and a head rest fixing device. The head rest fixing device comprises a fixing plate distributed in the vertical direction, a clamping plate distributed in the vertical direction, two retractable fixing rods distributed in the transverse direction and two connecting bases. The two retractable fixing rods are fixed between the top of the clamping plate and the top of the fixing plate. Two through grooves are formed in the two ends of the fixing plate respectively. A slide rail part is formed between each through groove and the end face of the corresponding end of the fixing plate, the two slide rail parts are connected with sliding tables in a sliding mode respectively, the sliding tables are connected with fastening bolts through threads, and the connecting bases are fixed to the sliding tables. The head rest plate is arranged between the connecting bases at the two ends, the two ends of the head rest plate are rotationally connected to the connecting bases respectively, the two ends of the back face of the head rest plate extend out of cylindrical rotating disks respectively, a plurality of limiting holes are evenly distributed in the rotating disks in the circumferential directions, each connecting base is provided with a positioning hole corresponding to the limiting holes, and positioning bolts penetrate through the positioning holes to be matched with the limiting holes in a threaded connection mode. The multifunctional head rest is convenient to use and has multiple functions.