Device and method for testing self-feeding force of self-feeding type nozzle

The invention discloses a device for testing self-feeding force of a self-feeding type nozzle. The device comprises a fixed testing bench (2), a simulating shaft (3), a pressure source (9) and a tension sensor (6), wherein the simulating shaft (3) is horizontally arranged on the testing bench (2); the self-feeding type nozzle (1) is arranged in the simulating shaft (3); the pressure source (9) is used for providing testing fluid for the self-feeding type nozzle (1); and the tension sensor (6) is arranged on the testing bench (2), is connected with the self-feeding type nozzle (1) through a tension testing wire (5), and serves as the self-feeding force of the self-feeding type nozzle when the testing fluid reaches a tension measuring value under the condition of set flow. By the device, working conditions of radial horizontal well drilling can be well simulated, and self-feeding force under the condition of different parameters is tested.