The invention relates to a rapid prediction method for the creep life of a polyester industrial yarn. The rapid prediction method comprises the following steps: carrying out standard tension testing,non-standard tension testing and creep testing on the polyester industrial yarn so as to obtain multiple groups of intensity and time data, and acquiring n fitting straight lines of the multiple groups of intensity and time data; according to an average value of straight slopes and intercepts of the n fitting straight lines, drawing a standard straight line, and rapidly predicting the creep breakage time of the polyester industrial yarn under a specific creep load according to the standard straight line, wherein standard tension testing has corresponding intensity and time of S1 and T1, the only difference between on-standard tension testing and standard tension testing is different tension velocities, non-standard tension testing has corresponding intensity and time of S2 and T2, creep testing has corresponding intensity and time of L and T3, the transverse coordinate of a coordinate system of the n fitting straight lines is the breakage time, and the longitudinal coordinate is a ratio of the intensity to S1. The rapid prediction method is good in adaptability, low in equipment requirement, simple in procedure, convenient to operate, short in time and high in popularization value.