Abstract: The paper aims to supply a method for accurately predicting the beginning of flowering period of pear in Guide Area. By using ground meteorological observation data and data of the beginning of flowering period of peal tree in Guide Meteorological Bureau during 2007-2014, the meteorological factors influencing the beginning of flowering period of peal tree were analyzed. The results showed that: the key factor affecting the beginning of flowering period of pear tree was the accumulated temperature of the temperature stability by 5℃ to the end of March. The prediction model of the beginning of flowering period of local pear tree was established by stepwise regression analysis method based on the principal meteorological factors. Using the established prediction model to back predict the beginning of flowering of pear tree in 2007- 2014, the accuracy was relatively high. By forecasting the data of the beginning of flowering of pear tree in 2015, there was only one day between the predicted value and the measured value, the measured value basically agreed well with the predicted value. The prediction model established in the study could curately forecast the beginning of flowering of pear tree in Guide Area.