The invention discloses a continuous rolling process of profile steel for a double-rubber ring socket steel ring of a prestressed concrete pipe. According to the continuous rolling process, (1) the cross-section dimension of a steel billet is 150*150 mm, the length is determined according to the length of a cooling bed of an application production line and the width of a heating furnace, and the initial rolling temperature is 1030 to 1080 DEG C; (2) rolling is performed for 11 passes in the whole line, the strong wide pass is adopted for rough rolling of the first three passes, a rolled pieceis rolled into the shape and size required by the next pass in the fourth and fifth passes, the closed pass is adopted for fine rolling, and the size of a groove of a sealing ring and the size of thetotal width of a finished product are guaranteed by using a width limiting principle; (3) the fine rolling is continuous rolling with six racks, wherein K2 adopts a four-roller universal mill, the rest adopts two-roller horizontal mills, and the lateral bending coefficient of the workpiece of each pass is less than plus or minus 0.01; and (4) an inlet guide of each finishing mill adopts a rollingguide with three groups of guide rollers, the first group include horizontal guide rollers, and the latter two groups include vertical guide rollers. According to the continuous rolling process, the problem of lateral bending of the head of socket steel in a rolling process is solved; compared with an open-train mill, the machine-hour capacity level of the steel product rolling mill is increased by one time.