The invention relates to a streamline type fluid unidirectional flowing device, which comprises a hyperbolic cavity body, a front end cover, a rear end cover and a guiding device. The front end cover is arranged on the front end of the hyperbolic cavity body in a sealing way; the rear end cover is arranged on the rear end of the hyperbolic cavity body in a sealing way; the guiding device is arranged in the hyperbolic cavity body, and comprises a guiding cone, a spring and a four-foot guiding cylinder; the guiding cone comprises a linear type front guiding cone body part and a curved shape rear guiding cone cylinder part; a cylindrical body of the four-foot guiding cylinder is sleeved in the rear guiding cone cylinder part; and the spring is located in a cavity formed by sleeving the guiding cone and the four-foot guiding cylinder. According to the streamline type fluid unidirectional flowing device provided by the invention, the streamline type guiding cone is designed, so that the fluid flowing resistance is less; and the four-foot guiding cylinder is designed, so that the guiding cone cannot produce offset when moving, and effective blockage is ensured when a fluid flows reversely.