The invention relates to a method for evaluating influence of self-elevating drilling ship pile pitching on an adjacent jacket platform pile foundation. The method comprises the steps of 1, determining the uniform equivalent elasticity modulus of a soil layer on one side of a jacket pile; 2, building a three dimensional structure analysis model and a three dimensional elastic-plastic finite element CEL (Couple Eulerian-Lagrangian) model and setting an elasticity modulus; 3, determining angles of environmental parameters; 4, determining UC value distribution of a pile body, pile head force and pile head displacement data under the environmental load effect; 5, determining the pile body displacement of the jacket pile foundation under the pile pitching squeezing effect; 6, building a pile soil non-linear footing beam module and calculating pile body internal force; 7, programming under MS EXCEL according to design codes in oceaneering to obtain the UC value distribution of the pile body under the action of the squeezing effect; 8, determining the UC value of the pile body under the coupling of the environmental load effect and the squeezing effect; 9, checking the UC value of the pile body under the coupling condition; 10, analyzing the jacket pile foundation; 11, checking the analysis result and judging whether the design requirement is met or not.