The utility model discloses a glass fiber reinforced plastic cover plate for a power cable tunnel, and belongs to the field of mechanical components. The glass fiber reinforced plastic cover plate for the power cable tunnel comprises a cover plate body, wherein the cover plate body at least comprises two layers of glass fiber reinforced plastics; one layer of aluminum alloy sandwich layer or aluminum alloy sandwich plate is arranged between the two layers of glass fiber reinforced plastics; the aluminum alloy sandwich layer is a honeycomb sandwich layer; the aluminum alloy sandwich plate is an aluminum alloy honeycomb plate. According to the glass fiber reinforced plastic cover plate for the power cable tunnel, the load bearing strength of a cover plate for the power cable tunnel is improved by using an aluminum alloy enhancement layer; the special requirements of the cover plate for the power cable tunnel are met by using the light weight, the good insulating property and the excellent corrosion resistance of the glass fiber reinforced plastic; requirements in practical work can be met completely.