The invention discloses a high-temperature-resistant self-cleaning low-noise energy-saving environmentally-friendly check valve which comprises a valve body, a valve seat, a valve clack and a guiding seat, wherein a spring is arranged between the valve seat and the valve body, and can compensate the relative displacement caused by the deformation of the valve clack and the valve seat; the matchedseal surface of the valve clack and the valve seat is an approximate 'V'-shaped smooth conical surface, thus the flow speed of fluids in the process from the downstream to upstream increases continuously, the seal surface of the valve clack and the valve seat is flushed continuously, and the fluids are leaded to leave away from the tail part edge of the conical surface for the valve clack, the fluids form the vortex, and the seal surface of the valve clack and the valve seat is protected and has less loss of pressure permanently; and the spring is arranged between the guiding seat and the valve clack, thus after a water pump stops operating, the check valve provided by the invention can automatically close. So, the check valve provided by the invention has the advantages of good seal property and long service life, and can be used as a material mixing device; and the check valve also has the advantages of high-temperature and low-temperature resistance, self-cleaning, low flow resistance, low noise, energy conservation, environmentally-friendliness and the like.