Aiming at the problem of the loss of degree of freedom caused by the transmitting array partitioning of two-dimensional hybrid multiple input multiple output(MIMO) phased array radar and its influence on the parameter estimation performance of radar system, the design of a transceiver array for two-dimensional hybrid MIMO phased array radar based on a cross array is proposed. Firstly, a sparse array-conjugated nested array is introduced into the design of the transceiver array of hybrid MIMO phased array radar. Then, the coarray generated by the hybrid MIMO phased array radar is processed to obtain the difference coarray of the position difference of the array elements. The difference coarray is finally subjected to spatial smoothing processing to estimate the direction of arrival. Simulation experiments show that compared with the traditional two-dimensional hybrid MIMO phased array radar, the proposed radar can form two-dimensional planar array expansion by two mutually perpendicular one-dimensional linear arrays, and does not increase the number of array elements. Under the premise, the number of virtual array elements of the radar array can be effectively expanded, and the degree of freedom of the array can be improved to improve the estimation performance of the direction of arrival.