Abstract: A housing structure for the heat-dissipation fan comprises a housing, a plurality of axial guide blades and a plurality of radial air inlets. The housing is provided with an air inlet and an air outlet between which receiving a stator and a rotor. The axial guide blades are equi-spaced and radially extended outward from the housing proximate the air inlet. Each of the radial air inlets is formed between any two axial guide blades. When the rotor is rotated, airflow sucked through the radial air inlets is guided parallel to an axis of the housing running from the air inlet to the air outlet so as to increase air inlet amount and reduce air noise.