The invention discloses an ignition apparatus used for a fan milled powder boiler. The ignition apparatus comprises coal dust ignition combustors (1), coal dust concentrators (7), a high-temperature furnace smoke pipe heater (5) and ignition assisting devices (3); the external surface of a hearth (6) is provided with the coal dust ignition combustors (1), the top of each of the coal dust ignition combustors (1) is provided with one coal dust concentrator (7), and the ignition assisting devices (3) providing coal dust igniting sources are arranged on the sidewalls of the coal dust ignition combustors (1) respectively; the high-temperature furnace smoke pipe heater (5) is arranged on the sidewall of a high temperature furnace smoke pipe (4); and coal dust output from a coal mill (2) goes through the coal dust concentrators (7) and then enters the coal dust ignition combustors (1). The ignition apparatus used for the fan milled powder boiler solves a low coal dust concentration problem of a large combustor and a cold furnace milling problem, and can realize cold furnace starting and energy saving.