The electrical resistivity and Hall factor in n-CdAs2, p-ZnAs2, and n-CdxZn1-xAs2 were measured at hydrostatic pressures up to 9 GPa and quasi-hydrostatic pressures up to 50 GPa at room temperature. For n-CdAs2, a phase transition was discovered at p = 5.5 GPa; for p-ZnAs2, two phase transitions were discovered: one at P = 10-15 GPa and the other at p = 35-40 GPa. No anomalies were found on. (p) and R (p) curves for CdxZn(1-x)As(2) when p <= 9 GPa.