The invention discloses a human body measuring device used for costume design. The human body measuring device comprises a pedal plate which is horizontally arranged, wherein a pair of measuring scales is arranged at the upper end of the pedal plate, the pair of measuring scales comprises a height measuring scale vertical to the pedal plate and a width measuring scale vertical to the height measuring scale, the width measuring scale can slide up and down along the height measuring scale, compressing and releasing assemblies are arranged at the top end of the height measuring scale and two endsof the width measuring scale, a measuring plate connected with the compressing and releasing assembly on the height measuring scale is in sliding match with the height measuring scale, a pair of measuring plates connected with the pair of compressing and releasing assemblies on the width measuring scale is in sliding match with the width measuring scale, and the pair of measuring plates is connected through an extension spring. Due to the adoption of the structure, the human body measuring device has the advantages that the measurement work amount of a designer can be reduced, and the measurement efficiency is also improved.