Horizontal well fracturing development technology has obtained good effects in thin low-permeability reservoir development. Different injection-production patterns lead to different fracture shapes and fracturing scale, which results in great difference of initial productivity and final recovery percent. In order to maximize productivity and economic benefit in horizontal well fracturing development, applied is numerical simulation method to design three kind of straight-flat-commingled-seven spot nets. In order to improve recovery percent and shorten water breakthrough time, optimized are horizontal well fracturing shapes: dumbbell shape for symmetrical injection­ production pattern, spindle shape for triangle injection-production pattern and rugby shape for quadrilateral injection-production pattern. To maximize economic benefit, optimized is the fracturing scale: symmetrical injection-production pattern has the highest total fracturing recovery percent, and triangle and quadrilateral injection-production patterns have the best economic benefit.