Abstract: Abstract: The solar chimney power plant (SCPP) is a natural draft device which uses solar radiation to provide upward momentum to the flowing air, thereby converting the thermal energy into kinetic energy. It is made of three parts: Collector, solar chimney and turbine. A study was undertaken to evaluate the performance of solar chimney experimentally in different collector angles of solar chimney power plant. In this study, an experimental instrument was constructed which was developed to study the effect of various parameters of the solar chimney. The effects of the collector slope angles on the solar chimney performance were studied. The distribution characteristics of the temperature field and vertical plane temperature field in the heat reservoir of different sets were analyzed. The local characteristics of the air were presented and analyzed. The results showed that the maximum temperature of the heat storage layer was kept between 71-88 ℃ in conditions with the same global horizontal irradiance (GHI). The non-uniformity of the thermal storage layer increased gradually as the angle of the collector slope was increased. The highest temperature and the Gr number in the vertical plane decreased gradually with the increase of collector angle. The temperature field distribution of thermal storage layer was different under different collector slope angles. The uniformity of temperature field was different. When the collector slope angle was 10°, the experimental data was optimal. The ambient temperature and the wind speed influenced the maximum temperature of thermal storage layer under the same irradiation intensity. The vertical plane temperature distribution in the collector was different under different collector slope angles. The maximum temperature in the collector outlet increased with the decrease of the collector slope angle. With the heat collector slope angle of 10 °, the average temperature in the outlet of the collector shed was 53.5 ℃, which was the maximum value compared with that of the other sheds. And the maximum temperature deviation in vertical plane was lower. The number of Gr in collector was different under different collector slope angles. With the decrease of the collector slope angle, there was a maximum value of Gr number. The inhomogeneity of the temperature field was between 0 and 1.7. When the inclination angle of the collector shed was 10 °, the non-uniformity coefficient of the temperature field was between 0.15 and 0.24. In the same collector slope angle, the change trend of Gr number was the same in different weather conditions. When the collector slope angle was 10°, temperature field distribution and homogeneity of the collector thermal storage layer, the exit temperature and Gr number in the vertical plane of the heat collector were maximum. So an optimal collector angel for solar chimney in Hohhot Inner Mongolia was determined by analyzing the temperature and its uniformity of thermal storage layer, vertical plane temperature field and Gr numbers in collector. And it can also provide experimental technical support in different parts to building solar chimney.