The invention discloses an inner fiber reinforced wood-plastic product. The inner fiber reinforced wood-plastic product comprises a product body, and clamping grooves which are formed in the left sideand the right side of the product body, wherein a plurality of through holes which pass through the front end and the rear end of the product body are formed in the product body; and a fiber reinforced material, which is close to the surface layer of the product body and encloses each through hole, is arranged between each through hole and the surface layer of the product body. According to the inner fiber reinforced wood-plastic product adopting the abovementioned structure design, the fiber reinforced materials are distributed to the surrounding side edges of a profile in a longitudinal andtransverse net form, so that the plane supporting and longitudinal supporting effects can be achieved, and as a result, the bearing capacity of the surface of a board as well as the overall intensityof the product can be improved. Additionally, the deformation resistance of the product is effectively improved, so that the durability of the product is improved; and moreover, the double-plane supporting effect enables high intensity holding effect of the product whether any one of the upper surface and the lower surface is treated as the using surface; and the decoration effect of upper and lower pattern splicing combination or plane or wave-shaped surface can be achieved.