An outdoor light holder structure includes: a holder body, a partitioning plate being disposed in the holder body; an assembling member buckled with the holder body; a first electro-conductive plate received in a first through hole of the holder body, the first electro-conductive plate having a first tip section and a first stop section extending to the assembling member; a second electro-conductive plate received in a second through hole of the holder body, the second electro-conductive plate having a second tip section and a second stop section extending to the assembling member, the first stop section and the second stop section being slightly raised from the partitioning plate; and a conductive wire disposed between the holder body and the assembling member. The first and second stop sections are inlaid and engaged in the conductive wire to secure the conductive wire with holder body.