Abstract: High molecular weight PA62/PEG2 copolymers were prepared by introducing polyethylene glycol diamine (PEG) as a soft segment by amine ester polycondensation in order to reduce the melting point of the high heat-resistant polyamide 62 (PA62) for ease of melt processability. FT-IR and NMR confirmed the successful preparation of copolyoxamide; DSC indicated that adding PEG inhibited the crystallization of PA62, effectively reducing the melting point and crystallinity of PA62; TGA showed that with the addition of PEG, the thermal stability of the copolymer was reduced, but the overall performance maintained; WAXD tests showed that when the molar content of PEG units was 25%, the crystallinity of the copolymer decreased with the increasing of PEG content, but the crystallinity still high; the high melting point PA62/PEG2 copolymer had the potential to be used as a high heat-resistant polyamide.