There is a famous FRL-FRH phase transition giving high pyroelectric coefficient with very little change in the dielectric constant and loss occurred near room temperature in Zr rich PZT ceramics. However，the temperature range of this phase transition is very narrow and the transition temperature could be changed by the variation of the Zr/Ti ratio. In this paper， two kinds of Mn doped starting materials， those Zr/Ti ratio were 95/5 and 93.5/6.5 respectively, were mixed sintered in order to broaden the phase transition temperature. It was found that, the temperature range was successfully extended when the two starting materials were pre treated at 1100℃ before mixed by the mass ratio of 1∶1. The pyroelectric coefficient p was higher than 6.3×10-8 C/(cm2·℃) and the figure of merit FD was higher than 7.7×10-5 Pa-1/2 in the temperature range 19 ℃ to 43 ℃. The effects of mixed sintering on their pyroelectric，dielectric and ferroelectric properties have been comprehensively studied, and it was found that the dielectric and ferroelectric properties were also improved.