The invention provides a kit for detecting lymphoid blood cancers (such as T / B lineage leukemia, lymphoma, myeloma minimal residual disease) developed based on high-throughput sequencing, the kit includes detecting IGH (VDJ), IGH (DJ), IGK, IGL, TCRβ, TCRγ, TCRδ, BCL1 / IGH, BCL2 / IGH multiplex PCR primer set with UMB (Unique Molecular Barcode, single molecule tag), House Keeping gene PCR primer pair, Multiplex PCR Mix (2X), internal reference DNA, Nuclease‑Free Water, Elution Buffer, and primers and index sequences required for high-throughput sequencing. Using the kit, newly mutated cancer cells can be found while detecting cancer cells, and by applying high-throughput sequencing technology combined with bioinformatics analysis, the detection sensitivity of MRD can detect at least one cancer cell in 1 million cells , which is 10 ‑6 (0.0001%), not only can quantitatively analyze the number of cancer cells to achieve the purpose of minimal residual disease detection, but also can correct sequence mutations caused by base mismatches generated by PCR amplification and sequence reading errors generated during library sequencing.