A single-hole linear jet flow mortar making nozzle comprises a shell, a one-way valve, a spring and a nozzle body. The shell is internally provided with an air inlet hole and an air chamber, the one-way valve and the spring are installed in the air chamber, one end of the spring is connected with the shell, and the other end of the spring is connected with the one-way valve; a tail rod is arranged on the one-way valve, and the tail rod is located in the spring; when high-pressure air passes through the air inlet hole, the high-pressure air pushes open the one-way valve and then enters the air chamber, switching-on and switching-off states of the one-way valve are controlled by the spring, and if the high-pressure air is not supplied, the one-way valve is pushed by the spring to the switching-off state; the nozzle body is installed on the shell and communicated with the air chamber, an incision rubber pad is arranged in the nozzle body, and a nozzle hole of the nozzle body is of a platode structure. By means of the single-hole linear jet flow mortar making nozzle, uniform tail mortar can be prepared rapidly and efficiently, the cleaning effect is significant, processing is convenient, the structure is simple, and the making cost is low.