The leaves of Corydalis angustifolia have pinnate compound leaves, usually 15-30cm long, 5-12cm long petioles, sparse hairs on petioles, 2 pairs of leaflets, 3-5cm apart, paper-based, lanceolate, oblong or narrowly oblong, 5-15cm long and 1.5cm-6cm wide. Its apex is sharp or gradually sharp, occasionally obtuse, and the base of the leaf is obtuse and round. Shiny
Panicle terminal, inflorescence wide, grow about 40 cm, inflorescence axis slightly long yellow brown pilose, flowers solitary, corolla purplish red, flag shaped broad egg or inverted broad egg.
The pods are linear or oblong, 7 to 12 cm long, 1.5 to 2 cm wide, flat, densely covered with gray hairs, with thin, nearly woody petals, long valved, and 3 to 5 seeds.