The invention discloses a basement support without a concrete diagonal brace. The basement support without the concrete diagonal brace is characterized in that a first-working-condition basement support structure is as follows: a support pile is a cast-in-site bored pile, a waterproof curtain is a three-axis cement mixing pile, a first pass of steel waist beam is arranged on the upper portion in the inner side direction of the support pile, a pre-stressed anchor cable is anchored on the first pass of steel waist beam, the width of a reinforced zone of a basement passive zone is within one meter in the tangent line of the outer edge of the support pile, and the depth of the reinforced zone is 1.5-2 meters below a basement foundation; a primary steel support is arranged between the first pass of steel waist beam and a steel base plate; a second-working-condition basement support structure is as follows: a second pass of steel waist beam is arranged in the middle in the inner side direction of the support pile, a second pass of pre-stressed anchor cable is anchored on the second pass of steel waist beam, a steel base plate is arranged on an engineering pile, a secondary steel support is arranged between the steel base plate and the first pass of steel waist beam, and a secondary steel support is arranged between the steel base plate and the second pass of steel waist beam.