The invention relates to the field of artificial plant technology, in particular to polyurethane artificial flowers and a production method thereof; the artificial flowers comprises blooms, stamens, flower poles and flower leaves which are all prepared by the following raw materials by weight percent: 41%-57% of polyether polyol, 1%-5% of amines catalyst, 1%-5% of crosslinking agent, 1% of foam stabilizer, 10% of foaming agent, 25%-30% of isocyanate, 2.5%-4% of anti-yellowing additive and 2.5%-4% of antioxidant through the following steps as follows: proportioning, pouring materials, closing dies, coloring, cutting and assembling; the preparation method is simple, the prepared polyurethane artificial flowers has the advantages of bright colors, good anti-buckling performance, difficult distortion, difficult yellow discolouration for putting for a long time, vivid image and lifelike feeling.