In order to mitigate spring frost damage to wheat in the Huanghuaihai region, this paper developed a combined frost index (CFI) based on daily meteorological observations collected from 46 stations between 2000 and 2020, along with wheat yield data. Grounded in the Soil-Plant-Atmosphere Continuum (SPAC) theory, which encompasses meteorological, soil, and crop factors, the study employed a combination assignment method based on ideal points to allocate indicators. Subsequently, this study delves into the spatial and temporal distribution characteristics of frost events in the Huanghuaihai region and carefully assesses the risk of frost damage in the region. The findings indicate that: (1) CFI was a significant predictor of relative meteorological yield in wheat across various growth stages, with a highly significant negative correlation observed, thus verifying the index's validity. (2) The results of our analysis indicated significant inter-annual variations in the wheat frost index (Tz), with particularly abrupt changes observed during the early and late spring frost events of 1997 and 2009. (3) The spatial distribution of wheat frost damage during the two growth stages exhibited distinct regional disparities, with a consistent northward increase in severity, predominantly concentrated in the northern part of the Huanghuaihai region.