The invention discloses an end thrust bearing for submersible motor in well, comprising a disk bearing support with a chucking lug and a concave spherical surface in the center of the bottom, a gap block consisting of a plurality of independent multipart bearing slide blocks, and a bearing disk fixed on the disk bearing support, wherein, the bearing disk is provided with a center hole, a limited post I with a groove I arranged on the inner circle edge, a limited post II with a groove II arranged on the outer circle edge, a positioning stud limiting the position of the multipart bearing slide block, and a spherical crown convex hall; the two surfaces of the multipart bearing slide block are smooth, and the big and small circular arc edges are provided with a flange. When the invention is installed, the big and the small circular arc edges are respectively embedded into the groove II and the groove I and then locked after being limited by the positioning stud, and each slide block is in a flexible and nondeciduous state. Therefore, the shape and the structure as well as the way of installation of the multipart bearing slide block are improved, the thickness of the multipart bearing slide block is greatly increased, the intensity and the surface finish quality are greatly improved, and the full contact of the multipart bearing with a trust disk is guaranteed. With good carrying capacity, abrasive resistance and simple structure, the friction plane is easy to be processed and the manufacturing accuracy is easy to be guaranteed.