Preparation method of high-bearing wear-resistant bushing

The invention discloses a preparation method of a high-bearing wear-resistant bushing. The method comprises the following steps: S1, preparing a bushing main body blank; s2, performing heat treatment on the bushing main body blank; s3, rough machining of the bushing main body; s4, finish machining of the bushing main body; s5, the bushing body is subjected to salt bath sulfur carbonitriding heat treatment, the co-permeation temperature ranges from 490 DEG C to 630 DEG C, the co-permeation time ranges from 60 min to 120 min, and the surface hardness HV.01 of the treated bushing body is larger than 920; s6, the lining body is subjected to sand blasting treatment, and the depth of a sand blasting layer ranges from 0.2 micrometer to 0.3 micrometer; s7, drying after ultrasonic cleaning; s8, plasma cleaning is carried out; s9, spraying a coating on the inner wall of the bushing main body; and S10, high-temperature curing treatment is conducted, the temperature ranges from 280 DEG C to 300 DEG C, and the heat preser