Disclosed is a titanium carbonitride based metal ceramic material based on a high-entropy alloy binder phase. The binder phase of the titanium carbonitride based metal ceramic material is high-entropy alloy, the hard phase of the titanium carbonitride based metal ceramic material is carbonitride solid solution, the high-entropy alloy binder phase includes at least four of ferrum, cobalt, nickel, chromium, aluminum, vanadium, titanium, copper, zirconium, molybdenum, manganese and rare earth elements, and the molar content ratio of each element ranges from 5% to 35%. In a preparation method, the titanium carbonitride based metal ceramic material based on the high-entropy alloy binder phase comprises raw materials including, in weight percent, 3-30% of the high-entropy alloy binder phase, 0-30% of second carbide powder and the balance carbonitride solid solution powder, the carbonitride solid solution powder includes at least one of Ti (Cx, N1-x), (Ti, M1...) and (Cx, N1-x), the M1 component of the (Ti, M1...) and (Cx, N1-x) includes at least one of W, Mo, Ta, Nb, V, Cr, Zr, Hf, Y and lanthanide, and 0<x<1 in the Ti (Cx, N1-x), (Ti, M1...) and (Cx, N1-x). The preparation method includes the process steps of (1) ball-milling mixing, (2) forming and (3) low-pressure sintering.