The invention provides an anti-interference steel pipe length measurement system and method. The anti-interference steel pipe length measurement system includes V type rollers and roller supports, wherein a motor is arranged on each V type roller; each V type roller and each motor are fixed on each roller support; each roller support is fixed on the ground; an inductive switch is arranged on eachswitch support, and the each switch support is fixed on the ground; the plurality of V type rollers are arranged at equal interval, and are consistent in height; the plurality of inductive switches and switch supports are arranged at the same height and at equal or unequal interval; the height of each switch support can guarantee that each inductive switch can detect a steel pipe; a push plate isarranged at the front end of an oil cylinder, a length measurement scale is arranged at the side surface of the push plate; the oil cylinder is fixed on an oil cylinder support; the oil cylinder support is fixed on the ground; and the push plate can be adapted to caliber change within certain limits. The anti-interference steel pipe length measurement system and method can effectively avoid the defect that length measurement of the steel pipe is not accurate because of interference of various external factors, and the measurement system has the advantages of simple and reliable structure, lowcost, high efficiency and convenient maintenance.