Negative deviation comprehensive control method for HRB500E deformed steel bar

The embodiment of the invention provides a negative deviation comprehensive control method for HRB500E deformed steel bars, and relates to the technical field of special rolling factories. The method comprises the steps that a finish rolling cooling water pipe is transformed, and the cooling speed of a rolling groove is increased; the inner diameter of the deformed steel bar and the size design of a transverse rib, a longitudinal rib and a hole pattern are controlled within the standard allowable negative deviation range, the height h0 of the hole pattern transverse rib is equal to h + (0.1-0.4) mm, and in the formula, h is the standard height of the hole pattern transverse rib; carrying out negative tolerance rolling on the semi-finished product of the deformed steel bar; before rolling is started, the roll gap value of the rolling mill is adjusted to be smaller than a preset value, and after rolling is started, the roll gap value of the rolling mill is adjusted to be an actual required value; and controllin