“There will be three hard years before the Dajjal (appears). During them, people will be stricken by a great famine. In the first year, Allah will command the sky to withhold a third of its rain, and the earth to withhold a third a third of its produce. In the second year, Allah will command the sky to withhold two thirds of its rain, and the earth to withhold two thirds of its produce. In the third year, Allah will command the sky to withhold all of its rain, and it will not rain a single drop of rain. He will command the earth to withhold all of its produce, and no plant will grow. All hoofed animals will perish, except that which Allah wills.” He (sallallahu `alaihi wa sallam) was asked, ‘What sustains people during that time?’ He said, “Tahlil, takbir and tahmid (Saying, la ilaha ill Allah, Allahu Akbar and al-hamdulillah).
So he is not the main Dajjal.
I have heard that they are going to be numerous Dajjals, but the main one , the most dangerous one will come in the end.
Allah sab ko bachai Dajjal ke fitnay se.