I order 4x msi 1060 3gb so tell me what psu i should buy for them?
You could probably get by with a 750W or 850W PSU (perhaps even 600W, but I wouldn't go that low), depending on your other components and your thoughts on clock speed. Count up the connectors carefully, and you might need to use one or more molex (preferred) or SATA to PCIe adapters, depending on what power connection(s) your risers accept.
Look at the underlying OEM before making a purchase. No-name generic PSUs should generally be avoided.