Oil injection device and afterburner

The invention discloses an oil injection device and an afterburner, relates to the technical field of aero-engine combustors, and aims to solve the problem that the oil injection state of an oil injection hole cannot be adjusted in the prior art. The oil injection device comprises a first pipeline, an oil supply device and a plurality of controllable switch assemblies. An inlet of the oil supply device communicates with an inlet of the oil supply device through the first pipeline. A plurality of oil spraying holes are formed in the pipe wall of the first pipeline at intervals, each controllable switch assembly comprises a switch part and a driving part connected with the switch part, the switch parts are arranged in the first pipeline, and the driving parts are used for driving the switch parts to close or open the oil spraying holes. The afterburner comprises the oil injection device provided by the technical scheme. The oil injection device is used for adjusting the oil injection state of the oil injection