The invention relates to a forklift attachment designed by multiple degrees of freedom and capable of realizing such functions as distance adjustment, lateral movement, rotation, switching between single tray and double trays, clamping and double layers of double trays. The forklift attachment comprises a main driving mechanism, and a double-fork driving mechanism connected to the main driving mechanism, wherein the main driving mechanism comprises a main panel, a main baseplate, a main rotary driving mechanism, a main translation upper guide rail and a main translation lower guide rail; the main baseplate, the main rotary driving mechanism and the main panel are connected in sequence to form a rotating mechanism of the main driving mechanism; the double-fork driving mechanism comprises a secondary baseplate, a secondary rotary driving mechanism, a secondary panel, a fork translation upper guide rail, a fork translation lower guide rail, fork translation oil cylinders and two parallel forks; the secondary baseplate, the secondary rotary driving mechanism and the secondary panel are connected in sequence to form a rotating mechanism of the double-fork driving mechanism; clamping mechanisms at the upper and lower ends of the secondary base are respectively clamped with the main translation upper guide rail and the main translation lower guide rail; and the side surfaces of upper and lower clamping structures of the secondary baseplate are respectively connected with movable ends of the two translation oil cylinders of the double-fork driving mechanism.