The invention relates to a position limiting block combined multi-size structure surface shearing box, which comprises an upper disc shearing box and a lower disc shearing box, wherein the lower discshearing box comprises a position limiting block 1, a position limiting block 2, a position limiting block 3, a position limiting block 4, a lifting collar, a collar bolt and a lower disc shearing boxouter frame, the upper disc shearing box comprises a position limiting block 1, a position limiting block 2, a position limiting block 3, a position limiting block 4, a lifting ring, a position limiting block fixing bolt and an upper disc shearing box outer frame, and the combination mode and the position of the position limiting blocks of the upper disc shearing box and the lower disc shearing box are the same. According to the present invention, the position limiting block combined multi-size structure surface shearing box with characteristics of good test effect, convenient operation, short construction period, low cost and small occupation space is provided.