Breeding method of corn haploid induction line

The invention discloses a breeding method of a corn haploid induction line. The breeding method comprises the following steps: step 1, respectively matching a silage corn hybrid and a multi-resistance common corn hybrid with JNY23 to obtain F1; step 2, carrying out 1-2 generations of selfing on the A*JNY23 and the B*JNY23 respectively, and measuring the inductivity of separation progenies of the A*JNY23 and the B*JNY23 by using a haploid inductivity test line KVC19; and step 5, hybridizing induction lines separated from the (A*JNY23)F3BC1 or (A*JNY23)F4BC1 and the (B*JNY23)F3BC1 or (B*JNY23) F4BC1, and separating and stabilizing a novel induction line. By selfing a multi-generation stable strain as the induction line, the generated induction line has the advantages of developed root system, drought resistance, lodging resistance, high temperature resistance, high humidity resistance, large pollen amount and long pollen scattering time, and can effectively expand the scale application and reduce the risk when