A push-pull bridge magnetic sensor, wherein the sensor comprises: at least one push-arm consisting of one or more electrically interconnected magnetoresistive sense elements on a push-arm substrate and at least one pull-arm consisting of one or more electrically interconnected magnetoresistive sense elements on a pull-arm substrate; at least two push-arm flux concentrators deposited on the push-arm substrate and at least two pull-arm flux concentrators deposited on the pull-arm substrate, wherein the push-arm flux concentrators and the pull-arm flux concentrators are composed of a material which is a magnetically-soft ferromagnetic alloy, the soft ferromagnetic alloy containing one or more elements of Ni, Fe and Co; wherein the push-arm flux concentrators and the pull-arm flux concentrators have long-axis directions aligned along a Y-axis direction and short-axis directions aligned along an X-axis direction; wherein the magnetoresistive sense elements on the at least one push-arm are located in gaps between two adjacent push-arm flux concentrators, and the magnetoresistive sense elements on the at least one pull-arm are located in gaps between two adjacent pull-arm flux concentrators; the at least one push-arm and the at least one pull-arm are electrically interconnected to form a bridge; magnetization directions of magnetic pinning layers of the magnetoresistive sense elements on the push-arm substrate are the same, and magnetization directions of magnetic pinning layers of the magnetoresistive sense elements on the pull-arm substrate are the same; and the magnetization directions of the magnetic pinning layers of the magnetoresistive sense elements on the push-arm substrate are opposite to the magnetization directions of the magnetic pinning layers of the magnetoresistive sense elements on the pull-arm substrate; and sense directions of the magnetoresistive sense elements on the push-arm and the pull-arm are the X-axis direction. at least one push-arm consisting of one or more electrically interconnected magnetoresistive sense elements on a push-arm substrate and at least one pull-arm consisting of one or more electrically interconnected magnetoresistive sense elements on a pull-arm substrate; at least two push-arm flux concentrators deposited on the push-arm substrate and at least two pull-arm flux concentrators deposited on the pull-arm substrate, wherein the push-arm flux concentrators and the pull-arm flux concentrators are composed of a material which is a magnetically-soft ferromagnetic alloy, the soft ferromagnetic alloy containing one or more elements of Ni, Fe and Co; wherein the push-arm flux concentrators and the pull-arm flux concentrators have long-axis directions aligned along a Y-axis direction and short-axis directions aligned along an X-axis direction; wherein the magnetoresistive sense elements on the at least one push-arm are located in gaps between two adjacent push-arm flux concentrators, and the magnetoresistive sense elements on the at least one pull-arm are located in gaps between two adjacent pull-arm flux concentrators; the at least one push-arm and the at least one pull-arm are electrically interconnected to form a bridge; magnetization directions of magnetic pinning layers of the magnetoresistive sense elements on the push-arm substrate are the same, and magnetization directions of magnetic pinning layers of the magnetoresistive sense elements on the pull-arm substrate are the same; and the magnetization directions of the magnetic pinning layers of the magnetoresistive sense elements on the push-arm substrate are opposite to the magnetization directions of the magnetic pinning layers of the magnetoresistive sense elements on the pull-arm substrate; and sense directions of the magnetoresistive sense elements on the push-arm and the pull-arm are the X-axis direction.