Aiming at the influence of meter clock drift on electricity spot market settlement, this paper carries out quantitative analysis of settlement deviation under different drift time and different price curves based on actual user load data and time-sharing price data. Firstly, the calculation model of settlement deviation under time-sharing price in electricity spot market is analyzed. Then, the influence of forward and backward clock drift of different users on settlement deviation is analyzed by different time clock drift scale. The influence of clock drift by different types of users' consumption habits on settlement deviation is studied. In consideration of the frequent fluctuation of electricity spot market price, the influence of different fluctuation levels of electricity price on settlement deviation is studied and analyzed. Finally, the influence of meter clock drift on settlement result in spot market is summarized and analyzed.