The commission of Taobao grocery shopping group leader is usually calculated based on a certain percentage of sales commission. The specific commission calculation method may vary according to different platform policies. The following is a common calculation method:

1. Commission based on sales: The group leader receives a corresponding commission ratio based on the sales of the team. For example, the group leader can receive a commission based on a certain percentage of sales (usually between 2% and 5%).

2. Commission based on team performance: When the total sales of the team reaches a certain amount, the group leader can receive a corresponding commission. This method usually sets different commission levels. For example, when the team sales reach 10,000 yuan, the group leader can receive a 2% commission; when the sales reach 20,000 yuan, the group leader can receive a 3% commission, and so on.

It should be noted that the commission calculation may also be affected by other factors, such as whether there are additional reward policies, team size, etc. Therefore, the specific commission calculation method needs to refer to the regulations of the Taobao grocery shopping platform or consult the relevant department or platform customer service to obtain accurate information.