A slide rail mechanism, comprising: a rail member; a first bracket (300, 400) movable relative to the rail member; and a reinforcing member arranged between the rail member and the first bracket (300, 400); wherein when the first bracket (300, 400) is moved and adjusted to an arbitrary position, the first bracket (300, 400), the rail member and the reinforcing member support each other; wherein the rail member comprises a first rail portion, a second rail portion and a longitudinal body connected between the first rail portion and the second rail portion, the first bracket (300, 400) comprises a first supporting portion (34a, 402), a second supporting portion (34b, 4046) and a longitudinal supporting portion connected between the first supporting portion (34a, 402) and the second supporting portion (34b, 404), the reinforcing member comprises a first wall portion, a second wall portion and a longitudinal wall connected between the first wall portion and the second wall portion; wherein the first wall portion of the reinforcing member comprises a first wall section and a second wall section bent relative to the first wall section, the second wall portion of the reinforcing member comprises a third wall section and a fourth wall section bent relative to the third wall section; wherein the first supporting portion (34a, 402) of the first bracket (300, 400) further comprises a first bending section (302, 406), the first bending section (302, 406) and a lateral side of the first rail portion of the rail member are able to support each other, the second supporting portion (34b, 404) of the first bracket (300, 400) further comprises a second bending section (304, 408), the second bending section (304, 408) and a lateral side of the second rail portion of the rail member are able to support each other; characterized in that the rail member has a first side and a second side, the reinforcing member is connected to the first side, the slide rail mechanism further comprises at least one moving rail movably mounted on the second side. a rail member; a first bracket (300, 400) movable relative to the rail member; and a reinforcing member arranged between the rail member and the first bracket (300, 400); wherein when the first bracket (300, 400) is moved and adjusted to an arbitrary position, the first bracket (300, 400), the rail member and the reinforcing member support each other; wherein the rail member comprises a first rail portion, a second rail portion and a longitudinal body connected between the first rail portion and the second rail portion, the first bracket (300, 400) comprises a first supporting portion (34a, 402), a second supporting portion (34b, 4046) and a longitudinal supporting portion connected between the first supporting portion (34a, 402) and the second supporting portion (34b, 404), the reinforcing member comprises a first wall portion, a second wall portion and a longitudinal wall connected between the first wall portion and the second wall portion; wherein the first wall portion of the reinforcing member comprises a first wall section and a second wall section bent relative to the first wall section, the second wall portion of the reinforcing member comprises a third wall section and a fourth wall section bent relative to the third wall section; wherein the first supporting portion (34a, 402) of the first bracket (300, 400) further comprises a first bending section (302, 406), the first bending section (302, 406) and a lateral side of the first rail portion of the rail member are able to support each other, the second supporting portion (34b, 404) of the first bracket (300, 400) further comprises a second bending section (304, 408), the second bending section (304, 408) and a lateral side of the second rail portion of the rail member are able to support each other; characterized in that the rail member has a first side and a second side, the reinforcing member is connected to the first side, the slide rail mechanism further comprises at least one moving rail movably mounted on the second side.