In this paper， we aim to realize the precision temperature control of EP satellite X-ray telescope. By establishing the mathematical heat transfer model of Wolter-I swept-incidence X-ray telescope， heat transfer law in the focusing mirror group is revealed， and two types of active temperature control heaters are designed. In view of the difficulty in regulating the thermal field caused by the non-uniform and discontinuous configuration of the telescope， an optimized precision temperature control method was proposed， taking into account the temperature control index and the difficulty of process development， and a cost function was constructed on how to partition and deploy the heat compensation. By setting the weighting parameters of average deviation， maximum deviation， number of zones and minimum zone length， the optimal design of the first type of heater was obtained. The whole-satellite vacuum test results show that： the temperature range of 54 lenses is 19.1~20.9 ℃， and the time domain temperature stability is good， the fluctuation is less than 0.2 ℃， which meets the index requirement of （20±1）℃ for X-ray telescope， and the weighting parameters are reasonably designed. The method proposed in this study successfully copes with the problem of precision temperature control for non-uniform and discontinuous X-ray telescopes， and provides technical support for space science detectors with high temperature requirements.