The invention discloses a controllable silicon pressure regulating and speed regulating device and a controllable silicon reversing control system thereof. The system comprises a phase sequence triggering unit, a human-computer interface unit and a control unit, wherein the phase sequence trigger unit is connected with a controllable silicon reversing unit; the control unit is used for receiving controllable silicon switching time data input by a user through the human-computer interface unit and saving, and after receiving a reversing signal of a motor operation direction of a lifting or a translational mechanism, timing according to the reversing signal of the motor operation direction of the lifting or the translational mechanism, when the timing time reaches the switching time of the controllable silicon, realizing reversing by controlling the phase sequence triggering unit and further controlling the controllable silicon reversing unit; if the switching time of the controllable silicon is larger or equal to the switching time of a motor rotor trigger of the lifting or the transitional mechanism, delay switching of the controllable silicon is realized, the problem caused by longer switching time of the rotor trigger than the positive and negative switching time of the controllable silicon in the prior art is avoided; when the device and the system are applied to a crane, the operation security of the crane can be enhanced.