A collapsible net for stopping flying balls and for installing on a floor includes a collapsible center coil loop, collapsible first and second side coil loops, a vertical fabric portion, top and bottom fabric portions, and top and bottom straps. The collapsible center coil loop includes a top part, a bottom part, and first and second side parts. Each side coil loop includes a top part, a bottom part, and inner and outer side parts. Each inner side part is connected to each side part of the collapsible center coil loop. The vertical fabric portion covers the openings of the coil loops for stopping the flying balls. The opening angle of the side coil loops are controllable. The propping device includes pecks and strings to fix the net to the floor.