Disclosed are a switch, a switching system, a switching network chip component, and a forwarding chip component. The switch includes: a switching network chip component packaged as an independent device, a forwarding chip component packaged as an independent device, and a controller. The switching system includes at least one switch and at least two network devices connected to the switch. The switching network chip component includes: a first cartridge housing, a switching network chip, a first heat dissipation component, and a first power supply component arranged inside the first cartridge housing. The forwarding chip component includes: a second cartridge housing, a forwarding chip, a second heat dissipation component, and a second power supply component arranged inside the second cartridge housing.