The invention discloses a three-dimensional GO sheet sphere particle modified organic composite ultra/micro filtering membrane preparing method. The method comprises the steps that firstly, a modified Hummers method is used for preparing graphene oxide; secondly, three-dimensional GO sheet sphere particles are prepared; thirdly, organic composite ultra/micro filtering membrane casting liquid is prepared; and fourthly, film forming curing is conducted, and a modified organic composite ultra/micro filtering membrane is obtained. The method mainly solves the problem that traditional nano particles are poor in dispersing effect in an organic phase solvent. The novel three-dimensional GO sheet sphere particle modified organic composite ultra/micro filtering membrane is prepared by adopting an immersion and deposition phase conversion method, and through adding of the novel GO sheet sphere particles, the three-dimensional GO sheet sphere particle modified organic composite ultra/micro filtering membrane is enhanced and improved in the aspects of flux, interception, the anti-pollution character, the membrane strength and the like. The preparing process is simple and operability is high. The prepared organic composite ultra/micro filtering membrane can be applied to the fields of potable water preparing, food, medicines, biology, environment protection and the like.