Tightener for badminton court separation net

The utility model discloses a tightener for a badminton court separation net, which comprises a U-shaped seat frame. A take-up shaft penetrating through two lateral walls of the U-shaped seat frame is arranged on the U-shaped seat frame, a handle is formed on one side of the take-up shaft, a fastening and locking mechanism arranged on the take-up shaft and the U-shaped seat frame is a ratchet wheel mechanism, a ratchet wheel is arranged on the take-up shaft, and ratchet is arranged on the lateral wall of the U-shaped seat frame. After structural modification, the take-up shaft can tighten a separation net rope by swaying the take-up shaft handle, and a one-way fastening and locking functions of the ratchet wheel mechanisms are further combined to realize more reliable tightening of a separation net.