Your question is unclear. Do you mean: 1. Wires drawn in the schematic with different stroke widths or;  2. Track with different widths on the PCB? Please provide more information and pictures to clarify your question. Note that the width of wires drawn in the schematic is to help clarify the schematic. It has no effect on the width of tracks routed in the PCB. If you want to route tracks on the PCB with different widths then route these tracks manually first then skip them in the Autorouter.

Of course, I mean the PCB, I tried to put 2 NET LABELS on one wire, but it gives an error, what do we do? I have a high current line connected to a low current line Thanks in advance, I really appreciate the help

As I  said: If you want to route tracks on the PCB with different widths then route these tracks manually first then skip them in the Autorouter. EasyEDA Std does not allow multiple segments of copper that are connected together to have different net names. If they are connected then they must have the same net name. See: [https://easyeda.com/forum/topic/Net-tie-a-copper-only-component-with-2-pads-to-split-nets-without-DRC-errors-and-multiple-netname-warnings-b6a099bf01bb4055b821ab398ee37b60](https://easyeda.com/forum/topic/Net-tie-a-copper-only-component-with-2-pads-to-split-nets-without-DRC-errors-and-multiple-netname-warnings-b6a099bf01bb4055b821ab398ee37b60#:~:text=A%20net%2Dtie%20in%20EasyEDA,distance%20between%20the%20two%20pads) It is possible to do this in EasyEDA Pro because a net tie element exists in Pro.

thanks alot