The work aims to study the influence of geometry parameters of carbonated beverage bottle`s petaloid bottom on the bottle bottom`s stress cracking. The stress cracking at the bottom of the bottle was observed by accelerated stress cracking test. The influences of the arc diameter at the bottom of groove, the side wall opening angle of the groove, the groove depth and the petaloid number on the maximum value of the maximum principal stress were respectively analyzed through single factor experiment. The significance of the effects of 4 geometrical parameters on the maximum principal stress was studied by means of all-factor experiment. Through the single factor experiment, we found that the maximum value of the maximum principal stress showed a downward trend with the increase of the side wall opening angle of the groove, arc diameter at the bottom of the groove and the number of the petaloid; however, the analysis results of the 4 data indicating the groove depth showed a upward trend of the maximum value of the maximum principal stress although with the increase of the depth. The results of all-factor experiment showed that only the arc diameter at the bottom of the groove, the number of the grooves and the groove depth had a significant influence on the maximum value of the maximum principal stress of the bottle bottom. In addition, the interaction of the groove depth and the number of grooves respectively with the arc diameter at the bottom of the groove also had significant influence. Finally, the regression equation of the relationship between the maximum value of the maximum principal stress at the bottom of the bottle and the geometric parameters with significant influence was fitted. The influence of relevant geometrical parameters on the stress cracking and its law are studied on the condition of uniform thickness. It is necessary to study the influence of thickness change and thickness distribution on the stress cracking subsequently.