The invention discloses a degradable environment-friendly packaging bag material and a preparation method thereof, and belongs to the technical field of logistics packaging, wherein the material comprises the following raw materials: low-density polyethylene, an MBS resin, butyl stearate, a butadiene styrene rubber, calcium carbonate, bamboo powder, nanometer copper oxide powder, zinc powder, zirconium oxide powder, zinc ethylhexanoate, microcrystalline paraffin, ramie fiber, vanadium oxide fiber, 2-hydroxyethyl-2-hydroxypropyl methyl ether cellulose, gamma-(2,3-epoxypropoxy)propyltrimethoxysilane, polylactic acid, sodium dioctylsulfosuccinate and 2-(dimethylamino)ethyl-2(alcohol) 2-methacrylate, and is prepared through raw material mixing, mixing, melt extrusion and other steps. Accordingto the invention, the prepared packaging bag material has advantages of excellent antibacterial property, excellent tensile property, excellent degradation property, excellent environmental protection property and the like, the production cost can be reduced, and the application requirements in the technical field of logistics packaging are met.