There is a parking space in the residential property that says no parking for non-management personnel? Is it reasonable and legal?

This is illegal. Parking spaces in the community belong to all owners and cannot be restricted to managers.

According to Article 66 of the Regulations on Property Management, in case of any of the following acts, the real estate administrative department of the local people's government at or above the county level shall order it to make corrections within a time limit, give it a warning and impose a fine in accordance with the provisions of the second paragraph of this article; The proceeds will be used for the maintenance and conservation of the parts and facilities used by the property in the property management area, and the rest will be used according to the decision of the owners' meeting: (2) occupying or excavating roads and sites in the property management area without authorization, which harms the interests of the owners.