The invention belongs to the technical field of phased array radars, and relates to an X-band high-integration-level two-dimensional phased array radar radio frequency front end. The X-band high-integration-level two-dimensional phased array radar radio frequency front end comprises an antenna housing, active phased array subarrays adopting a silicon-based TR chip, a heat dissipation shell, a power division and synthesis network, a wave control power supply board, a sum-difference network, a frequency synthesizer receiver and a data acquisition board, the heat dissipation shell serves as a main body support, the multiple active phased array subarrays are installed on the heat dissipation shell, heat generated by the active phased array subarrays is conducted to the heat dissipation shell, and the heat is conducted to the two sides of the heat dissipation shell through heat pipes on the back of the heat dissipation shell. The sum-difference network and the wave control power panel are correspondingly arranged on the same plane, and the wave control power panel and the sum-difference network are installed on the back face of the heat dissipation shell and share the back area. The X-band high-integration-level two-dimensional phased array radar radio frequency front end has the characteristics of low cost, high integration level, modularization, strong heat dissipation capability and high reliability, and has rapid maintenance capability.