The invention discloses a control method for the coating amount of anti-rust oil on the surface of a cold-rolled sheet and belongs to the technical field of metal surface anti-rust treatment. A cold-rolled product sample is sheared into a sample base plate, and blow-drying is performed after deoiling and washing treatments are finished; 1-4 drops of anti-rust oil are sucked through a dropper, dropwise added on the surface of the base plate and uniformly spread through a rubber roller; and roller coating is performed through a clean roller, and the oil coating amount of the base plate is determined through a weight difference method. The control method for the coating amount of the anti-rust oil on the surface of the cold-rolled sheet has the advantages that the characteristics of the anti-rust oil are not changed, and the oil coating amount approximately equal to that of actual production is obtained on the sample base plate without long-time still standing.