The invention belongs to the ultrasonic precision measurement technical field and relates to an oil film thickness static calibration apparatus. The main body mechanism of the oil film thickness static calibration apparatus includes an upper top plate, supporting legs, cross beams, an oil groove, adjustable supporting feet, a small connecting rod, angle adjusting bolts, a left connecting plate, aleft translation stage, a left L-shaped plate, a tensioning adjustment bolt, a clamping block, an ultrasonic probe, a large connecting rod, a right L-shaped plate, a right translation stage, a right connecting plate, a first coupling, an ultrasonic transmitter/receiver, an oscilloscope and a PC; the angle adjusting bolts are distributed in an array at the middle of the upper side surface of the upper top plate with the small connecting rod adopted as a center; the cross plates of the left L-shaped plate and right L-shaped plate are located below the ultrasonic probe, so that a relative positional relationship between the cross plates of the L-shaped plate and the right L-shaped plate can be adjusted; and during static calibration, the height of the right translation stage can be adjusted,so that an arbitrary oil film thickness can be realized. The oil film thickness static calibration apparatus has the advantages of small system error, high calibration accuracy, friendly application environment and bright market prospect.