The invention provides a computer desk mat based on electromagnetic heating. The computer desk mat based on electromagnetic heating comprises a mat body, a bearing loading piece and an air exhauster,a groove is formed in the middle of the mat body, an electromagnetic heating piece is fixedly embedded in the groove, the bearing loading piece used for placing data and erecting a keyboard is installed on the mat body, and the bearing loading piece comprises an installation frame, a sliding rod, a sliding block, an L-shaped clamping plate and a plastic spring, the installation frame is fixedly mounted on the cushion body, a horizontally-arranged sliding rod is fixedly erected on the installation frame, the sliding rod is sleeved with two sliding blocks connected in a sliding mode, each sliding block is provided with an L-shaped clamping plate connected in a rotating mode, the sliding rod is connected with a plastic spring in series, and the two ends of the plastic spring are fixedly connected with the two sliding blocks respectively, two air exhausters which are used for heating and refrigerating are installed on the two sides of the bearing loading piece respectively. The computer desk mat based on electromagnetic heating has the advantage of being convenient to adjust.