As a control assembly in hydraulic choke manifold, can remote control opening and closing of hydraulic choke valve, and the control panel can indicate the standpipe pressure, casing pressure and the position of the hydraulic choke valve switch, if equipped with pump stroke counter can also display the pump stroke and frequency of three mud pump separately , which can maintain the balance of down-hole pressure. It is a necessary device to kick control and blowout and perform the pressure control technology in oil/gas.