Provided are a MYH4 gene molecule marker for improved pork quality and use thereof in porcine genetic improvement. The molecule marker comprises at least one of: (I) a nucleotide Y at site 11031 from the 5' end of SEQ ID No. 1; (II) a nucleotide Y at site 1780 from the 5' end of SEQ ID No. 2; (III) an SNP marker on a nucleotide sequence III being 90% or more identical to SEQ ID No. 1 and/or SEQ ID No. 2, the SNP marker identical to an SNP marker at site 11031 from the 5' end of SEQ ID No. 1, the nucleotide sequence III being capable of translating in the porcine into a protein with the same function as SEQ ID No. 3; and (VI) an SNP marker having a linkage disequilibrium degree r2 equal to or greater than 0.8 with an SNP in at least one of (I) to (III). Y is selected from C or T.
