Toddler refused to eat. Is it good?

My son is 2 years 0 months old . Weight 10.7 kg and height 87 cm. He is a picky eater. So feeding him is a big problem for me .when he was 1 year old then he preferred to eat in his own hand . He has a high chair which is very comfortable . But now when he turned 2 then he stopped to eat in his hand and refused to eat regular solid food which me and my family eats . But vegetable purée fruit purée etc he like to eat . If I give him solid food he will throw it up . Why he is doing this kind of behaviour is it good? One day we brought him mc d for seeing that what's his problem . But there he enjoyed French fries his own . Me and my husband was surprised to saw that. But don't know why he refused to eat at home . I had tried French fries pizzas etc fast foods at home but bad luck.