The invention discloses a precision tide generating force calculation and influence factor analysis method. The method comprises six steps of building a calculation function model of tide generating potential of a celestial body for a station point on earth; converting a celestial reference system; calculating a Legendre function and a derivative thereof; calculating tide generating force of the celestial body for the station point on the earth; performing checking calculation on a total gravitational force value of the celestial body for the station point; and performing data calculation and analysis. On one hand, the data calculation process is simple and convenient and is high in universality, so that the mastering and exchange of a data calculation method are facilitated; and on the other hand, the disadvantages that the accuracy of calculation process and result cannot be quickly determined due to lack of check conditions and the difficulty in Legendre function expression derivation is multiplied along with an increase in order in a conventional tide generating force calculation process are effectively overcome, and interference factors easily occurring in the tide generating force calculation process can be conveniently analyzed and eliminated, so that the accuracy and reliability of tide generating force calculation work are greatly improved.