Grey College were leading Sentraal 57-3 when the referee ended the match after just 36 minutes.
The visitors had scored nine tries when the final whistle was blown early to stop the carnage.
Fullback Jandré de Beer, No 8 Dian Schoonees, wingers Henk Cilliers and Marnus Boshoff, flanker Juan Venter, outside centre David Kriel (three) and lock Jaco de Beer all crossed the line. Flyhalf Christopher Schreuder kicked six conversions.
In other Free State matches, Grey College 2nd XV won 31-19 at Fichardtpark, HTS Louis Botha beat Jim Fouché 35-25 and Welkom Gym gave Kroonstad a 70-5 hiding.
Free State schools results (23 April):
Grey College 57 Sentraal 3
Grey College 2nd XV 31 Fichardtpark 19
Jim Fouché 25 Louis Botha 35
Welkom Gym 70 Kroonstad 5
Photo: Carl Fourie/Gallo Images