The invention provides an embolism microcatheter, which comprises a catheter seat, a de-stressed tube and a catheter body. The near end of the catheter body is connected with the catheter seat, and the far end of the catheter body is provided with a mark ring; the de-stressed tube is arranged outside the catheter body in a sleeving mode, the length of the de-stressed tube is smaller than the length of the catheter body, and the near end of the de-stressed tube is connected with the catheter seat; and the catheter body is sequentially divided into an outer layer, a woven layer, a first combinedlayer, a second combined layer and an inner layer from outside to inside, and the outer layer comprises a first near section, a second near section, a transition section and a far section which are mutually connected in sequence in the direction of the far end of the catheter body. The two sets of combined layers are additionally arranged between the inner layer and the outer layer so that the inner layer and the outer layer can be combined better, the structure is more stable, and thus the pushing property, flexibility and the passing ability of the microcatheter are improved greatly.