The invention provides an overturning-type folding on-bed suspension desk which solves the problems that an existing lazy desk is inconvenient to use, small in size, short in life and not suitable for a multi-people bedroom with a small space, and relates to the field of mechanical design. The suspension desk comprises two desk plates, a fixing support, two hooks, a groove, an overturning plate, front desk feet, convex cylinders, short connecting rods, long connecting rods, back desk feet and fisheye bolts; the hooks and the groove are arranged on the fixing support, the overturning plate is connected with the fixing support, the front desk feet are fixed on the front desk plate, the convex cylinders are arranged on the outer sides of the front desk feet, the short connecting rods are arranged on the inner sides of the front desk feet, the long connecting rods are in shaft connection with the short connecting rods, and the back desk feet are provided with long grooves; the long connecting rods are fixed on the front desk plate, the convex cylinders and the fisheye bolts are both located in the long grooves, the overturning plate and the back desk plate are connected through a desk plate pin shaft, desk legs are unfolded to be stored in grooves formed in the front desk plate through the action of the long connecting rods and the short connecting rods, the back desk feet move along the front desk feet through the action of the long grooves and the convex cylinders, and the back desk feet and the front desk feet are fixed through the fisheye bolts to achieve length regulation of the desk legs. The suspension desk is convenient to use, long in life, safe, reliable and suitable for the multi-people bedroom with the small space.