Abstract: We correct their gravitational effect of the water depth, sediment thickness and average crustal thickness using the latest gravity data from the Arctic Canada Basin and its surrounding areas. And then we collect the sonar buoy data of the area and digitize 57 control points. We calculate the Moho depth of this area using the interface with controlling point based on the Parker method. The results show that the Moho depth gradually deepens from west to east .It’s shallowest at the junction between the edge and the west of the basin, about 12 km, indicating that there may be insufficient compensation. The Moho in Alaska has the deepest depth, at least 30km, supposing that the area is more strongly squeezed or abundant supplies of sediment thickens the crust. The change of depth is consistent with the changes in the crust structure of the oceanic-continental transition zone-continental crust, which supports a counterclockwise rotation pattern.

Key words: gravity anomaly, Moho depth, Parker method, known control points, Canada Basin