The invention relates to a composite bearing for a fork truck. The composite bearing comprises a main roller, a shaft head, a side roller and a side roller bracket, wherein the main roller is mounted on the shaft head in a sleeving manner; a cylindrical inner chamber penetrating through the whole shaft head is arranged in the shaft head; the cylindrical inner chamber comprises an embedded part and an adjusting part; the embedded part is an unthreaded hole; the adjusting part is provided with internal thread structures; the side roller bracket is internally arranged in the cylindrical inner chamber; the outer surface of one section, positioned at the adjusting part of the shaft head, of the side roller bracket is provided with an external thread structure; the side roller is mounted on the side roller bracket through a side roller shaft; the side roller is higher than the top end face of the shaft head; a structure used for preventing the side roller bracket from rotating relative to the shaft head is arranged between the side roller bracket and the shaft head. The composite bearing for the fork truck has the advantages that the structure is simple, when the side roller is worn and needs to be adjusted, all needed is to directly rotate the side roller bracket, the side roller can be adjusted; the adjustment is convenient and the deflection of the side roller bracket in the shaft head does not occur.