The invention belongs to an anti-shearing structure for connecting a reinforced concrete enclosing purlin with fender posts in the field of supporting of foundation pits. The basic ideas provided by the invention are as follows: a plurality of fender posts are uniformly arranged outside the reinforced concrete enclosing purlin; an outward protruding anti-shearing reinforcing steel bar is arranged in the concrete caulking between adjacent post seams of the fender posts; the protruding end of each outward protruding anti-shearing reinforcing steel bar is arranged in the corresponding concrete caulking; the other end of each outward protruding anti-shearing reinforcing steel bar is anchored into a concrete protective layer opposite to the reinforced concrete enclosing purlin. The anti-shearing structure for connecting the reinforced concrete enclosing purlin with the fender posts, which is disclosed by the invention, is simple and reliable in node design, good in anti-shearing property, convenient to construct and high in practicability; the anti-shearing bearing capacity is increased through the concrete caulking between the reinforced concrete enclosing purlin and each fender post and the outward protruding anti-shearing reinforcing steel bars.