The invention discloses a rotating speed adjustable laser ignition rotation experimental device, which comprises a lens cover, a laser lens, a combustion chamber shell, an air inlet pipe, a lower box cover, a lower box, a wiring pipe, a brushless direct current motor, a lower box bottom plate, bevel gears, a sealing screw, a hollow rotating shaft, a sample rod, an exhaust pipe and a drop-proof cap. Before experiment, air tightness detection is firstly carried out on the device provided by the invention to ensure good air tightness, then a solid propellant sample is fixed on the sample rod, the rotating speed of the brushless direct current motor is adjusted, and the rotating speed of the sample rod is calculated according to the transmission ratio of the gears. When the rotating speed of the brushless direct current motor reaches an experiment required value and maintains stable, a laser is turned on, the laser beam irradiates on the solid propellant sample in a rotary state through the laser lens, and the sample ignites. The experimental device provided by the invention has a simple structure and is convenient to operate, and can realize laser ignition experiment of the solid propellant sample under a rotating state.