Abstract: When using the principle of collecting light to produce thermoelectric power, some lights can not arrive condenser plate due to the fact that light travels in straight line and some are blocked by the battery plate, so the bottom of the battery plate produces shadow area, resulting in the overall output power decreasing.In order to improve the overall output power, based on the example of the parabolic condenser plate, this paper proposed the planar type and parabolic type design to make up the shadow area.Based on the construction model, the parameters of shadow area were acquired, and thus the optimal compensation size and setting angle of planar and parabolic reflector were obtained.After that, the compensation design of planar and parabolic reflector was made.The best solution of planar compensation was as follows.The size of 2 planar reflectors was2 times the width of shadow region, the left planar reflector’s setting angle was 135°, and the right planar reflector’s setting angle was 45°.If there was a deviation angle, the setting angle for the left and right reflector would change to 135° minus the deviation angle and 45° minus the deviation angle accordingly, and at the same time, the left planar reflector must be increased to a certain height.Also, the related parameters of parabolic compensation were obtained, such as arc length, placement angle and aperture size.In the case of planar compensation, the simulation was carried out with Tracepro.By setting different size and setting angle in Tracepro, the correctness of the theoretical compensation method was proved.And under the same conditions, the effects of the 2 kinds of compensation methods were compared.The results showed that the planar reflector’s compensation illumination range was about 1 W/m2, and the parabolic reflector’s illumination range was about 2 W/m2, so the performance of parabolic reflector was better than that of planar reflector.By compensation, the shadow area at the bottom of the cell panel was well eliminated.In order to verify the simulation results, experiments were carried out at Northeast Agricultural University on October 21, 2015.Measurement parameters included ambient temperature, surface temperature of heat collector, temperature of cold end, and the output voltage and current.The measure period was from 09:00 to 14:00.The energy of hot end of the thermoelectric module came from the parabolic condenser plate, and the cold end used the natural wind cooling.It should be pointed out that the outside influence factors were ignored.Compared with no compensation, the temperature of thermoelectric generator (TEG) under planar compensation and parabolic compensation had a significant increase in the hot end, and the parabolic compensation and planar compensation ranged from 315.14 to 357.46 K and from 312.6 to 453.4075 K respectively, while the temperature of the cold end was almost constant and ranged from 285.12 to 290.47 K.The output power of no compensation, planar compensation and parabolic compensation ranged from 20.05 to 28.94 W, from 20.36 to 29.78 W and from 21.04 to 30.35 W respectively.The originality of this paper was the research on the effect of the compensation of shadow area at the bottom of solar thermoelectric power generation sheet on overall output power.In conclusion, the work above shows that the overall output power is improved by effective compensation, more precisely, parabolic compensation is better than planar compensation.