本文研究了太阳在主序前半程质量损失对自转角速度改变的影响。给出了太阳因太阳风和光子辐射造成的质量损失对自转角速减慢的影响理论式子。理论结果表明太阳自转角速随质量损失和时间变化逐渐减慢。计算结果也表明太阳在主序前半程自转角速度减速很慢。表1给出了太阳在主序前半程1 × 109，2 × 109，3 × 109和4 × 109年时自转角速减速的数值。最后做了简要讨论。 The influence of solar mass-lose due to solar wind and photo-radiation upon the change of the ro-tational angular velocity of the sun on the pre-half time of main sequence is studied. The theoretical formulae are derived for the decrease of mass and angular velocity with time. The theoretical results show that mass and angular velocity of the sun decrease with time and its decrease of the solar mass and angular velocity are very slowly on the main sequence phase. The numerical values for the decrease of solar mass and the angular velocity in 1 × 109 yr, 2 × 109 yr, 3 × 109 yr and 4 × 109 yr are given in Table 1. Discussions are drawn.
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