The utility model aims at providing a circumscribed cell -phone signal enhancement antenna, including the base, be provided with signal receiver and signal transmitter on the base, be provided with the connector on the base, the cell -phone headphone jack who treats signal amplification go up to peg graft and to have the joint, be connected base and cell -phone with connecting through the connector, the inside signal transfer device that is provided with of base, signal receiver and signal transmitter are in relevancy with signal transfer device respectively, and passing signal transfer device is delivered to the signal of reinforcing in the cell -phone. Couple together cell -phone and signal enhancement equipment with connecting through the connector to strengthen communication signals through signal receiver and signal transmitter, improve the communication quality, and through the shell with the slip open -ended combination protect signal receiver and signal transmitter, extension equipment life sets up temperature control device, improvement work efficiency is worked to assurance equipment under the temperature that suits.