Master access point, sub access point and wireless network deployment system

The invention provides a master access point, a sub access point and a wireless network deployment system. The master access point is applicable to the wireless network, the master access point is cascaded with a switch and a plurality of sub access points in the wireless network mutually, the master access point is directly connected with a port of the switch, the master access point comprises an upper interlinkage port, a PoE (Power Over Ethernet) module, a master switching module, an isolated power supply, a low-voltage power module and a master lower interlinkage port and power supply module. The sub access point comprises an upper interlinkage port, a sub switching module and a low-voltage power module. Another sub access point comprises an upper interlinkage port, a sub switching module, a low-voltage module, a low-voltage power module and a sub lower interlinkage port and power supply module. The system comprises the mutually cascaded switch, the master access point and the subaccess points. According