There are many indications for mechanical thrombolysis for cerebral infarction, which are as follows: 1. Time is life, time is brain, and it is the most critical factor; Generally, mechanical thrombolysis for cerebral infarction has the best therapeutic effect within 6 hours of the onset of the disease, and if it exceeds this time, according to the international multi-center controlled study, the time window of the anterior circulation thrombolysis can be prolonged even to 24 hours; 2. Age: The age requirement is generally above 18, and even the high boundary can reach more than 80 years old. Age: the age requirement is generally above 18 years old, even the high boundary can reach more than 80 years old, and foreign countries reported that patients aged 90 years old can receive mechanical thrombolysis; 3, the indications also include the need for emergency CT examination before treatment, because CT scanning is relatively fast compared with MRI scanning, which can fight for time for the patient; CT should exclude large cerebral infarction, that is, to see a large area of low-density shadows; it should be ruled out that there is subarachnoid hemorrhage or signs of hemorrhage; 4, when carrying out emergency thrombolysis, it is necessary to get the patient’s consent to the treatment. 4, in the emergency treatment to remove the thrombus, to obtain the consent of the patient or family members and their guardians before the treatment. Indications of the combination of the above, the key to master is: cerebral infarction after the occurrence of CT examination, to exclude bleeding disorder; pay attention to the time window, the time window of the anterior circulation in the 6-8 hours, the posterior circulation up to 24 hours, relatively speaking, in the time window of the treatment of the patient is to achieve better results. If patients are treated beyond the time window, bleeding complications as well as failure to recanalize may increase, and the prognosis for the patient may not be favorable.