The utility model provides a built -in wireless device's both arms street lamp relates to the street lamp field, including the lamp pole, the lamp pole upper end is fixed with electric box, and electric box bilateral symmetry sets up the cantilever lamps and lanterns, the lamp pole passes by electric box is inside, and the inside of electric box is provided with wireless router and the radio signal antenna of connecting wireless router, the radio signal antenna comprises two radio signal reception antennas and two radio signal transmitting antennas, wireless router fixes on the lamp pole that passes electric box section, and wireless router's circuit is drawn forth in by this section lamp pole. The utility model provides a built -in wireless device's both arms street lamp can not satisfy the illumination needs, can also be for providing the service that wireless network inserted on every side, electric box permeates with the cantilever lamps and lanterns and personally experiences sth. Part of the body as the support connection structure of cantilever lamps and lanterns, electric box, and wholeization is effectual.