The invention discloses a virtual reality all-in-one machine capable of capturing head tiny actions in a high-precision manner. The virtual reality all-in-one machine comprises an all-in-one machine shell, wherein the all-in-one machine shell is fixedly connected with camera lenses; a semicircular retaining cap is fixedly connected with one side wall, close to the camera lenses, of the all-in-one machine shell; the outer wall of the top of the retaining cap is coated with a reflective coating layer; a semicircular collection apparatus is arranged above the retaining cap; high-definition cameras are fixedly connected with one side wall, close to the reflective coating layer, of the collection apparatus; the outer wall of the top of the collection apparatus is fixedly connected with an adjusting rod; a supporting rod is movably connected on the upward side of the adjusting rod; a telescopic rod is fixedly connected with the outer wall at the bottom, far from the adjusting rod, of the supporting rod; a nine-shaft dynamic sensor and a first signal transmitter are arranged in the all-in-one machine shell; and the output end of the first signal transmitter is connected with a first signal receiver. The head action capturing precision of the virtual reality all-in-one machine is improved.