The Blade Spares None (Chinese: 刀不留人; Dao bu liu ren ) is a 1971 Hong Kong action film with sword fighting directed by Teddy Yip Wing Cho.
Ho Li-Chun, an attractive but powerful swordswoman, fights at a tournament at Prince Kuei's Palace. A knight, Chen Jo-Yu, is defeated but later returns with another knight Tang Ching-Yun who is in possession of a peculiar sword. Ho recognizes this as the weapon once used by Sun Tien-Chen, an enemy foe of her family. Investigating the case, she learns that Prince Kuei was actually murdered and it is Sun who has assumed his identity as an imposter. Ho in coordination with Chen and Tang plan to confront him and eventually attack the palace.