A personal handphone system (PHS) signal enhancer relates to a device which can enhance the received signal of a PHS and is characterized in that the device is composed of a tinfoil cylinder with one end open and the other end closed, the diameter of the tinfoil cylinder is 90 mm to 110 mm, and the height of the tinfoil cylinder is 300 mm to 320 mm; an antenna terminal is arranged on the tinfoil cylinder and is provided with brass wires inside; the tinfoil cylinder and the antenna terminal are bought from a market. When the device is in use, one end of an extension line of an antenna of the PHS is connected with the antenna terminal, and the other end is connected with an externally connected antenna interface of the PHS. The utility model has the advantages that a self-made antenna is only needed to be simply connected to the externally connected antenna interface, and then the opening end of the cylinder faces to the base station. The direction of the antenna can be rotated so that an angle with best receiving effect is found, thus the additional arrangement of the external antenna at least ensures the signal intensity displayed on the PHS to be increased by one to two columns.