ZTS　crystals　have　been　grown　from　aqueous　solution　by　slow　cooling　technique.　The　largest　size　of　the　crystals　is　28　×　16　×　14　mm3.　The　lattice　parameters　and　the　space　group　have　been　obtained　by　the　X-ray　powder　diffraction.　The　NLO　properties　of　the　crystal　have　been　measured　by　the　test　of　powder　frequency-doubling　experiment,　and　compared　with　that　of　KDP　crystal.　The　result　shows　that　ZTS　crystal　is　a　good　and　phase-matching　NLO　material.　The　transmissibility　of　the　crystal　is　not　less　than　80%　in　the　wave　length　range　350-1400　nm.