Valve element pre-tensioning type one-way valve for micro diaphragm pump

The utility model provides a valve core pre-tensioning type one-way valve for a miniature diaphragm pump, which relates to the technical field of valve bodies and comprises a first pump cavity component, a second pump cavity component is arranged at the top of the first pump cavity component, and two valve core mounting positions are arranged on the first pump cavity component. Valve element fixing grooves are formed in the four corners of each valve element mounting position, and a plane type one-way valve element is arranged at the top of the first pump cavity assembly. The plane type one-way valve core is processed into a function partition structure, specifically, the function partition structure is divided into the fixing part, the tie bar and the sealing part, in the assembling mode, the plane type one-way valve core is installed in a fixing groove, the plane type one-way valve core is stretched to generate pretightening force after being installed in place, and a protruding through-flow hole structure