To import a stone crusher machine from China to Canada, you will need to first determine the specific machine you wish to import. You will then need to find a supplier or manufacturer of the machine in China. Once you have found a supplier, you will need to work with them to complete the necessary paperwork and arrange for shipment of the machine to Canada. In Canada, you will need to clear the machine through customs and comply with any regulations related to importing machinery. Additionally, you may need to obtain any necessary permits or licenses to operate the machine in Canada.