The invention belongs to the technical field of vehicle shock absorbers, and in particular relates to a built-in electromagnetic valve type semi-active damping continuously adjustable shock absorber and a control method, including a shock absorber body and a shock absorber control system, characterized in that the shock absorber The vibrator body includes a working cylinder, an oil storage cylinder, a shock absorber dust cover, a bottom valve assembly, a piston assembly, and a solenoid valve assembly. The invention also discloses a control system for a continuously adjustable shock absorber with built-in damping method, this control method can carry out continuous switching control of different modes of soft and hard damping on the shock absorber, rationally integrate the solenoid valve and the piston inside the damping continuously adjustable shock absorber, and the valve core part adopts different cross-sectional structures, At the same time, guides are designed around the valve core to make the valve core more stable, which can not only achieve better vibration reduction, but also realize damping adjustment of different comfort levels. It is easy to use, saves space, has broad application prospects, and is convenient for popularization and use.