Surface-coated cutting tool and method for manufacturing same

A surface-coated cutting tool comprising a substrate and a coating film that coats the substrate, wherein

• the coating film includes a hard coating layer constituted of a domain region and a matrix region,
• the domain region is a region having a plurality of portions divided and distributed in the matrix region,
• the domain region has a structure in which a first layer and a second layer are layered on each other, the first layer being composed of at least one first AlTi compound selected from a group consisting of Alx1Ti(1-x1)N, Alx1Ti(1-x1)BN, and Alx1Ti(1-x1)CN, the second layer being composed of at least one second AlTi compound selected from a group consisting of Alx2Ti(1-x2)N, Alx2Ti(1-x2)BN, and Alx2Ti(1-x2)CN,
• the matrix region has a structure in which a third layer and a fourth layer are layered on each other, the third layer being composed of at least one third AlTi compound selected from a group consisting of Alx3Ti(1-x3)N, Alx3Ti(1-x3)BN, and Alx3Ti(1-x3)CN, the fourth layer being composed of at least one fourth AlTi compound selected from a group consisting of Alx4Ti(1-x4)N, Alx4Ti(1-x4)BN, and Alx4Ti(1-x4)CN,
• the first AlTi compound has a cubic crystal structure, and the second AlTi compound has a cubic crystal structure,
• the third AlTi compound has a hexagonal crystal structure, and the fourth AlTi compound has a cubic crystal structure,
• x1 is more than or equal to 0.77 and less than or equal to 0.9,
• x2 is more than or equal to 0.5 and less than or equal to 0.6,
• x3 is more than or equal to 0.85 and less than or equal to 0.95, and
• x4 is more than or equal to 0.55 and less than or equal to 0.62.