Real-time PCR is applied to qualitatively detect three types of BCR-ABL1 fushion gene, i.e, P210 (e13a2 and e14a2),P190(e1a2) and P230 (e19a2) in peripheral blood or bone marrow samples, which allows typing detection of P210, P190 and P230.but cannot distinguish between e13a2 and e14a2 in P210