A surfboard comprises a board body (1), wherein the board body (1) is composed of an upper layer (2) made of organic high polymer materials, a foam core plate (3) and a bottom layer (4), the upper layer (2) and the bottom layer (4) wrap the foam core plate (3) inside, the bottom layer (4) is made of a bottom surface layer and a foam plastic inner layer (41), the bottom surface layer is composed of a transparent first polyethylene layer (42), a non-woven fabric layer (43) printed with patterns, a second polyethylene layer (44), a strengthened non-woven fabric layer (43) and a third polyethylene layer (45) sequentially from bottom to top, and the first polyethylene layer (42), the second polyethylene layer (44) and the third polyethylene layer (45) are molten into a fluid state and bond the non-woven fabric layer (43) printed with the patterns, the strengthened non-woven fabric layer (43) and the foam plastic inner layer (41) together to form the bottom layer (4) of the board body (1). The surfboard has the advantages that the bottom surface is smooth, hardness and strength are high, surf sliding resistance is small, use is flexible, the structure is firm, and the service life is long.