The utility model belongs to the field of cooling of data center machine rooms, and relates to an elevated machine room cooling floor. The elevated machine room cooling floor comprises a box and a bottom board used for arrangement of a plurality of draught fans, a vertical baffle is arranged on one side of the bottom board, the bottom board is of a push-pull drawer type structure through a track arranged on the box, an edge is arranged on the periphery of the top face of the box in a protrusive mode and used for being installed above an existing closed plenum chamber channel of an original machine room, the top face is of a shutter structure, the bottom of the box is through, and when the bottom board is pushed into the box, an airflow channel is formed in the periphery. According to the machine room floor which is designed according to the machine room elevated type standard floor dimension and can automatically perform grouping for adjusting the wind speed along with temperature changes, the floor is directly installed on an elevated floor in front of a server rack and matched with the existing closed plenum chamber channel of the machine room, the airflow can be adjusted automatically according to the machine cabinet front-end temperature required by design under the situation of not affecting heat dissipation of equipment in the original machine room, local hot spots are eliminated rapidly and easily, and targeted heat dissipation is carried out.