In order to learn through the rules of temperature and heat resources changes in the reclamation area of Xinjiang Eighth Agricultural Division, the author learn about the characteristics of heat resources changes with meteorology data from 1955 to 2012 by using the climatological statistical and diagnostic techniques of climate tendency rate, standard deviation and signal to noise ratio. The results showed that:annual average temperature, accumulated temperature of temperatures greater than or equal to 0℃ and accumulated temperature of temperatures greater than or equal to 10℃ had an obvious increasing trend, with the climate tendency rate of 0.364℃/10 a, 89.981℃·d/10 a and 111.23℃·d/10 a. Annual average temperature experienced a mutational increase in 1989, with an increase of 1.2℃ after the mutation; accumulated temperature of temperatures greater than or equal to 0℃ experienced a mutational increase in 1989, with an increase of 254℃ · d/a after the mutation; accumulated temperature of temperatures greater than or equal to 10℃ experienced a mutational increase in 1994, with an increase of 377℃·d after the mutation. There existed an obvious climate warming in 1990s in the reclamation area of Xinjiang Eighth Agricultural Division and an increase of heat resources there. These had both positive and negative effects on agriculture. People should exploit heat resources under the first principle of seeking advantages and avoiding disadvantages and this research offered basis of agricultural climate resources for local agriculture development and adjustment of local crop cultivation.