Abstract: The paper analysis the effect of texture analyzer parameters( trigger point, test rate and shape deformation) on the texture parameters of potato(hardness,crunchiness,chewiness,springiness,cohesiveness).On the base of single factor experiment,using the multi factors orthogonal experiment to find the best texture analyzer parameters of texture parameters of potato,meanwhile,chosen the hardness as the determination indicator of injury degree of potato in the TPA test,analysis the effect of three factors(trigger point,test rate and shape deformation) on the injury degree of the potato tuber. The preliminary experimental result showed that:the optimal combination to test texture of the potato tuber was A2B1C3 through the TPA analyzer,namely the trigger point load was 7 g,testing rate was 0.5 mm/s,shape deformation was 70%. The shape deformation of potato tuber had very significant effect on springiness,and had significant effect on degree of determination,hardness and chewiness,but had no significant effect on crispness and cohesiveness. Except the trigger pointer of potato tuber had significant effect on cohesiveness in TPA test,the other factors had no significant effect on cohesiveness. The test rate had no significant effect on the test result.