The disclosure provides crystalline form of oxopicolinamide derivative and a preparation method thereof. Specifically, the disclosure provides crystalline forms A,B,C,D,E and F of the compound of formula (I) and preparation method thereof. The crystalline forms A,B,C,D,E and F of the compound of formula (I) obtained by the disclosure have good crystalline and chemical stability, which can be better used in clinical treatment.本披露提供了一種酮基吡啶醯胺類衍生物的晶型及其製備方法。具體而言,本披露提供式(I)所示化合物的A、B、C、D、E、F晶型及製備方法。本披露所得到式(I)化合物的A、B、C、D、E、F晶型具備良好的晶型穩定性和化學穩定性,可更好地用於臨床治療。