The invention discloses a method for quickly identifying the heat resistance of a crop germinating seed. The method comprises the following steps: thermally treating seeds at a temperature of 46+/-0.5 DEG C for 60+/-20 minutes in a germinating phase of the seeds of a green vegetable to be identified; transferring the seeds to a place at a temperature of 28+/-2 DEG C for cultivation for 1 to 5 days; and measuring the length of embryonic roots, observing the growing condition of plants, and screening the heat resistance plants of the green vegetable. The method has the advantages of short time consumption, simple operation, accuracy and high efficiency.