Meningioma is a common intracranial tumor, and about 80% of meningiomas are benign, but there are some meningiomas that are malignant, and these meningiomas are not only prone to recurrence after surgical resection, but may also metastasize. I gave a presentation on meningioma at the 3rd Huaxia Neurosurgery Forum in Wenzhou in 2019, in which a case of malignant mesenchymal meningioma was treated with 3 surgical resections and radiotherapy and chemotherapy, but eventually the tumor progressed and died of pulmonary metastasis after 3 years. In the last two years, we have treated several cases of meningioma metastases. One of the recent cases at the end of 2020 was a 55-year-old man who had two craniotomies in 2011 and 2016 to remove the tumor, and the pathological diagnosis was atypical meningioma. Moreover, multiple nodules were found in the lungs. The pathological diagnosis was atypical meningioma, and about 3 weeks after the brain surgery, the patient had the largest pulmonary nodule removed thoracoscopically, also atypical meningioma. There was another case of a 56-year-old male patient who also had three surgeries to remove the tumor in June 2016, 2019, and 2020, respectively, with a postoperative pathological diagnosis of mesenchymal meningioma and was treated with general radiation therapy and Gamma Knife in December 2018 and 2019, respectively, before the tumor was found to have recurred again in early 2021 due to impaired limb movement. The preoperative MRI showed that the recurrent tumor was located near the original tumor resection site, but there was a relatively large tumor located next to the original tumor location and some distance from the original surgery site, which was considered to be a metastasis of tumor cells in the form of implantation dissemination after the last surgery, and this tumor was found to be growing along the brain surface very extensively during surgery; and the patient also had an isolated pulmonary The patient also had an isolated lesion in the lung, which was also confirmed to be a malignant mesenchymal meningioma after thoracic surgical resection. Not only can malignant meningiomas develop distant metastases to sites such as the lungs, but scattered tumor cells may also undergo implantation metastases, resulting in new metastatic lesions near the original surgical access or site of surgery. Metastases are not uncommon in meningiomas and are usually seen in non-benign WHO grade II and WHO grade III meningiomas, and are often found with recurrence of the tumor. Meningiomas are not only prone to distant metastases outside the brain, but also to intracranial implantation metastases. For non-benign meningiomas, one needs to be alert not only for tumor recurrence, but also for metastases.