The invention discloses a strapless protective shoe for outdoor climbing sports, which comprises a front paw body, a rear paw body, a fixer fixed on the rear paw body, and a shoe clip fixed on the end of the rear paw body away from the front paw body. A positioning mechanism is installed on the top of the front claw body, and a telescopic rotation mechanism is arranged between the front claw body and the rear claw body. This strapless protective shoe for outdoor climbing sports is different from the prior art in that it is based on a spring without On the basis of the straps, when the size of the user's feet is different, the relative movement and relative deflection of the front paw body and the rear paw body can be effectively realized to ensure the normal wearing and use of the protective shoes, and the toes can obtain sufficient grip strength, so as to ensure normal, stable and efficient walking and climbing. At the same time, it can effectively locate the actual size of the user's toe, so as to cooperate with the fixer to effectively avoid the problem of protective shoes falling off during walking, so as to more effectively ensure the safety of the shoes. Stable and efficient use of the body.