Thin film transistor, display substrate and display device

The invention provides a thin film transistor, a display substrate and a display device, belongs to the technical field of display, and can solve the technical problem that an existing thin film transistor is large in leakage current. The thin film transistor comprises a substrate, and an active layer, a grid electrode, a source electrode and a drain electrode which are positioned on the substrate, the grid electrode is provided with one or more hollow structures; the grid electrode is divided into a plurality of sub-grid electrodes which are electrically connected by the hollow structure; andthe orthographic projection of each sub-grid on the substrate is partially overlapped with the orthographic projection of the active layer on the substrate. 本公开提供一种薄膜晶体管、显示基板及显示装置，属于显示技术领域，其可解决现有的薄膜晶体管漏电流较大的技术问题。本公开的薄膜晶体管包括：基底、位于基底上的有源层、栅极、源极和漏极；栅极具有一个或多个中空结构；栅极由中空结构划分为多个电连接的子栅极；每个子栅极在基底上的正投影均与有源层在基底上的正投影部分重叠。