Liftable operation room and under-pressure workover rig

The liftable operation room comprises an operation room body, an installation platform, a lifting mechanism, an electric control mechanism, a hydraulic system and a fixed base, the operation room body is fixedly arranged on the installation platform, the bottom of the lifting mechanism is connected to the fixed base, and the top of the lifting mechanism is connected to the installation platform; the electric control mechanism is fixedly arranged on the fixed base and comprises a hydraulic pump and a motor; the lifter forms a scissor structure; the electric control mechanism drives the lifting mechanism through the hydraulic system to achieve lifting of the operation room and the installation platform. The lifting operation room is arranged in the middle of the vehicle, when the vehicle is moved, the operation room descends to the lowest point and is fixed, and rising and falling of a derrick are not affected. During workover operation, the height of the table top of the operation room is increased through the