The invention discloses a multiple-beam antenna by using antenna housing with strip metal block construction. The multiple-beam antenna comprises an omnidirectional irradiation dipole aerial and three groups of metal array and antenna housing that are formed by strip metals; the antenna housing and the dipole aerial are arranged in parallel; a metal plate is positioned at the back of the dipole aerial; two metal arms of the dipole aerial is in parallel to the strip metal on the antenna; the dipole aerial is arranged at the center of the antenna. The distance between circuit boards is adjusted to be zero, thus causing the index of refraction of the circuit boards to be zero on some working point; when the electromagnetic wave emitted from radiation source passes through the antenna housing, the electromagnetic wave can be emitted in the normal direction of multiple planes of the antenna housing, and a plurality of narrow beams with high gain are obtained. The invention is characterized in that the multiple-beam antenna has simple structure, each beam has average energy, can be distributed as required and has high gain; therefore, the multiple-beam antenna can be applicable to various wireless transmissions such as communication, radar, and the like and an emission and receiving system which needs multiple-beam and high-gain irradiation.