The invention provides a biodegradable polymer blood vessel support subjected to injection molding, belongs to the technical field of medical machinery, and relates to the biodegradable polymer blood vessel support which is molded by adopting an injection method. The support is composed of equal-height waveform support units, non-equal-height waveform support units, an arc connection unit and a straight rod connection unit; each equal-height waveform support unit is constituted by evenly arranging six or eight equal-height basic waveforms in the circumferential direction. Each non-equal-height waveform support units is constituted by alternately and circularly arranging six or eight non-equal-height basic waveforms in the circumferential direction, two adjacent non-equal-height waveform support units adopt a heterogeneous arrangement form, and the phase difference is 90 degrees. The biodegradable polymer blood vessel support subjected to injection molding has good radial support performance, flexibility, axial abbreviation and inflation/compression uniformity. The radial mechanical support performance is improved, the radial rebound rate is lowered at the same time, and the support structure can be molded by adopt the injection method.