Display substrate and display device

According to the display substrate and the display device, the display substrate is provided with a display area and a non-display area, the display area is provided with sub-pixels arranged in an array and a plurality of first signal lines, the non-display area is provided with a first power supply line to an Nth power supply line, at least part of the first signal line extends in the first direction, and at least part of the Nth power supply line extends in the second direction. At least part of any one of the first power supply line to the Nth power supply line extends in the second direction, and the first signal line is electrically connected with the sub-pixel and is configured to provide an initial signal to the sub-pixel; the display area is divided into M display sub-areas arranged in the second direction, the first signal lines located in the same display sub-area are connected with the same power supply line, and the first signal lines in at least two display sub-areas are connected with different