Present experimentation was done to study the effect of ZnO-SnO2 composite on different morphological parameters of Black gram. In this work, we have synthesized ZnO-SnO2 nanocomposite by Chemical co-precipitation method and characterized it using X-ray diffraction spectrograph, UV-visible absorption spectroscopy, scanning electron microscope and Transmission electron microscope. The particle size of synthesized nanocomposite material lies between 25.75 nm to 39.16 nm. The synthesized nanocomposite exhibited needle shaped morphology and showed maximum absorbance at 355 nm of wavelength. For studying the effect of synthesized nanocomposite material on morphological parameters of Black gram, healthy and presoaked seeds of Black gram were treated with three different concentration of ZnO-SnO2 composite (i.e. 20, 40, and 60%). Control was also maintained for each set. Black gram belongs to family Fabaceae and is commonly used as a food for protein and other nutritive substances. Black gram is also used as green manure for agricultural practices. During the field observation a significant effects have been observed on various morphological parameters. A reduction in germination and survival percentages were also observed in treated sets.