The invention discloses a dual-number display multifunctional seedling cultivation control instrument which comprises a shell (1). A countdown cycle control circuit (2), a photosensitive delay circuit (3), a power outage alarm circuit (4) and a temperature display control circuit (5) are arranged in the shell (1). The dual-number display multifunctional seedling cultivation control instrument is simple in structure, the countdown cycle control circuit, the photosensitive delay circuit, the power outage alarm circuit and the temperature display control circuit are arranged in the shell, and the atomization operation countdown time and set atomization time are displayed on a number display window of the shell through the temperature display control circuit, the photosensitive delay circuit and the countdown cycle control circuit, so that an atomizing device with load controlled by actual temperature and light intensity sprays mist to tree seedlings, automatic control over atomization in the whole process is achieved, an alarm is automatically given out under the power failure condition or the over-temperature condition, the seedling cultivation process is safer and more reliable, manual intervention is not needed, and labor and production cost are saved.