A display substrate, comprising: a base substrate; a plurality of pixel units, located on the base substrate; at least one first power line, located on the base substrate; a blocking structure, surrounding the plurality of pixel units; an auxiliary connection structure, comprising a first side surface and a second side surface opposite to the first side surface, wherein the first side surface is closer to the plurality of pixel units than the second side surface is; a cathode layer, located on a side of the auxiliary connection structure distal from the base substrate; a first organic pattern, located on the side of the auxiliary connection structure distal from the base substrate; and at least one second power line; wherein one end of the at least one first power line is located on a side of the blocking structure distal from the plurality of pixel units, and is configured for receiving a power signal; and the other end of the at least one first power line is located between the blocking structure and the plurality of pixel units, and is connected with the cathode layer through the auxiliary connection structure; an orthographic projection of the auxiliary connection structure on the base substrate has a first projection region and a second projection region, the first projection region and an orthographic projection of the blocking structure on the base substrate do not overlap, and the second projection region and the orthographic projection of the blocking structure on the base substrate overlap at a first overlapping region; the first projection region is closer to the end of the at least one first power line for receiving the power signal than the second projection region is; the at least one second power line comprises a first portion and a second portion; the first portion is located on the side of the blocking structure distal from the plurality of pixel units, and is configured for receiving the power signal; characterised in that the second portion is connected with the cathode layer through the auxiliary connection structure, the second portion comprises a first junction and a second junction that are connected with the auxiliary connection structure, and a distance between the first junction and the blocking structure is greater than a distance between the second junction and the blocking structure, wherein optionally, the display substrate has a bonding region located on the side of the blocking structure distal from the plurality of pixel units; and the first junction is closer to the bonding region than the second junction is. a base substrate; a plurality of pixel units, located on the base substrate; at least one first power line, located on the base substrate; a blocking structure, surrounding the plurality of pixel units; an auxiliary connection structure, comprising a first side surface and a second side surface opposite to the first side surface, wherein the first side surface is closer to the plurality of pixel units than the second side surface is; a cathode layer, located on a side of the auxiliary connection structure distal from the base substrate; a first organic pattern, located on the side of the auxiliary connection structure distal from the base substrate; and at least one second power line; wherein one end of the at least one first power line is located on a side of the blocking structure distal from the plurality of pixel units, and is configured for receiving a power signal; and the other end of the at least one first power line is located between the blocking structure and the plurality of pixel units, and is connected with the cathode layer through the auxiliary connection structure; an orthographic projection of the auxiliary connection structure on the base substrate has a first projection region and a second projection region, the first projection region and an orthographic projection of the blocking structure on the base substrate do not overlap, and the second projection region and the orthographic projection of the blocking structure on the base substrate overlap at a first overlapping region; the first projection region is closer to the end of the at least one first power line for receiving the power signal than the second projection region is; the at least one second power line comprises a first portion and a second portion; the first portion is located on the side of the blocking structure distal from the plurality of pixel units, and is configured for receiving the power signal; characterised in that the second portion is connected with the cathode layer through the auxiliary connection structure, the second portion comprises a first junction and a second junction that are connected with the auxiliary connection structure, and a distance between the first junction and the blocking structure is greater than a distance between the second junction and the blocking structure, wherein optionally, the display substrate has a bonding region located on the side of the blocking structure distal from the plurality of pixel units; and the first junction is closer to the bonding region than the second junction is.