Ozone absorption of ultraviolet radiation is a main heat source and plays an important role in radiation balance of stratosphere.Solar cycle,especially ultraviolet radiation,can directly affect the stratospheric heating rate.According to the data from SIM(Spectral Irradiance Monitor) on the satellite SORCE,it indicates that the reduction of ultraviolet radiation is more than four to six times as prior research results in the weak solar activity years from 2004 to 2007.The variation of ultraviolet radiation can affect the stratospheric heating rate by changing ozone distribution.Through qualitative research,ozone concentration mixing ratio shows strong positive anomaly in lower stratosphere,and also indicates positive correlation with solar heating rate in upper stratosphere in the strong solar activity years.In addition,lots of studies of stratospheric radiation balance used the annual average data.However,BD(Brewer-Dobson) circulation relates with planetary wave effects and atmospheric thermal radiation plays a main role in stratospheric radiation balance in winter.To understand the essence,analysis of summer stratosphere is particularly significant.Thus,the main purpose of this paper is using the data of SIM and the mode of atmospheric radiation model to quantitatively study the effects of variations of ultraviolet radiation and ozone concentration mixing ratio in the solar cycle on the ozone heating rate(OHR) and the net heating rate(NHR).Based on the BCC-RAD Model,OHR and NHR in stratosphere in the Northern Hemisphere in summer are calculated by using the ERA-Interim monthly reanalysis data from European Centre for Medium-Range Weather Forecasts(ECMWF) during 1979-2013 and the solar spectral irradiance data from National Oceanic and Atmosphere Administration(NOAA) from 2004 to 2010.Variations of zonal mean OHR(NHR) in stratosphere in the 11-yr solar cycle are discussed,and the causes of differences between the strong and weak solar activity years are discussed.The results can be summarized as follows:Compared to the weak solar activity years,the ultraviolet radiation is stronger in the strong solar activity years,which results in the positive anomalies of OHR and NHR in whole stratosphere,and the anomalies increase with height.Ozone concentration mixing ratio shows negative(positive) anomaly in lower(upper) stratosphere,which leads to the similar pattern of both OHR and NHR,and slightly upward migration(because of the efficiency of ozone absorption in ultraviolet increases with height).As for OHR and NHR in upper stratosphere,the ultraviolet radiation plays a main role at stratopause,and ozone takes the most important part in other spaces.In this paper,the effects of ultraviolet radiation to ozone in chemistry are not discussed.In order to systematically study the influence of solar cycle on stratosphere,it needs to use chemical climate model for more detail simulation analysis.