PURPOSE: To obtain the title fine spinning frame controlling rising length of snail wire at a point of time of 50 % bundle of cop, suppressing end breakage, having excellent operation efficiency in high-speed revolution, reaching the maximum number of revolutions in a short time and stably and highly producing spun yarn.

CONSTITUTION: In a ring fine spinning frame having snail wire operating a rising pattern, the snail wire is linearly raised until a cop 3 reaches a point of time of 50% bundle while subjecting a bobbin 4 to rise and fall operation from a winding starting position 1, rise length LL of the snail wire at a point of 50% bundle is controlled ≤15mm, high tension caused by extreme balloon expansion is reduced as much as possible from the starting of winding which increases ballooning tension and has large stretch approximately to the 50 % bundle, end breakage is suppressed to the utmost and the rising pattern of the snail wire of controlling new stretch which has excellent workability at high-speed revolution, reaches the maximum number of revolutions in a short time and stably produces a large amount of yarn is set to stably operate the ring fine spinning frame at ≥18,000rpm average number of revolutions of spindle at high speed.