The invention provides a novel three-dimensional degree-of-freedom burner support device. The novel three-dimensional degree-of-freedom burner support device comprises a lift base plate, a lift, a supporting plate, a first guide mechanism, a second guide mechanism, a burner lifting frame, a burner bracket and a burner. The supporting plate is fixedly connected with an output shaft of the lift; the burner lifting frame is fixedly connected with the supporting plate and fixedly provided with a pair of slide rails which are mutually parallel in the horizontal direction; the first guide mechanism and the second guide mechanism are fixed to the two opposite ends of the burner lifting frame respectively; the burner bracket is fixed on the slide rails in a sliding mode and fixedly provided with a pair of moving guide rails which are perpendicular to the slide rails in the horizontal direction; the burner is installed on the moving guide rails in a sliding mode. According to the novel three-dimensional degree-of-freedom burner support device, stable moving and safe supporting of the burner assembly in three dimensions are achieved, and the heating requirements for internal combustion engine heated part thermal fatigue tests of different cylinder numbers, cylinder diameters and volume power are met.