A light-emitting substrate and a display device are provided. Each light-emitting unit includes a first voltage terminal. The first voltage line includes a first portion, a first connecting portion, and a second portion. The first portion is electrically connected with first voltage terminals of a first row to a Y-th row of light-emitting units in a corresponding column. An extension direction of a second portion of the first voltage line has an included angle with both the first direction and the second direction. The first connecting portion is at boundary of the Y-th row and a (Y+1)-th row of light-emitting units. The first transmission line is electrically connected with first voltage terminals of the (Y+1)-th row to an N-th row of light-emitting units in a corresponding column, and is electrically connected with the first connecting portion of the first voltage line corresponding to light-emitting units of a corresponding column.