The present invention relates to combinations of a linker bridged gene or domain fusion reverse transcriptase enzyme, and more particularly, combinations of a linker bridged gene or domain fusion reverse transcriptase enzyme and their fusion construction utilizing for more efficient and quality DNA synthesis in reverse transcription. The composition of the invention includes a polymerase domain; a linker, consisting of 3-40 amino acids; and an RNase H domain, wherein the RNase H domain is either unmodified or modified with point mutations. The composition may further include another mutated RNase H, a mutated RNase A, and an additional linker which consists of 3-40 amino acids.