The utility model discloses a detection kit for heavy metal cadmium. The detection kit comprises a plastic support (7) and a test strip (16), and is characterized in that a test strip zone (1), an extract liquid A hole site (2), an extract liquid B hole site (3), an extract liquid C hole site (4), a spare hole site (5) and an elisa plate frame storage groove (6) are formed in the plastic support (7); the test strip zone (1) is partitioned into four same test strip bottle hole sites (1-1) by partition bars; and the test strip (16) is composed of a protective film paster (12), a back plate (8) and a detection zone (15). The detection kit has the beneficialeffects of being high in detection sensitivity, simple and convenient to operate, high in detection speed, and convenient to operate, can be applied to large-scale screening detection of the heavy metal cadmium in samples such as feed-grade copper sulphate and water quality, and is very suitable for basic level detection.