The invention relates to an intelligent control system for mechanical parking systems, which belongs to the technical field of mechanical parking systems. The intelligent control system comprises a PLC (programmable logic controller), the PLC is connected with a power supply, the signal input ends of the PLC are connected with a parking switch SB1, a retrieval switch SB2, a stopping switch SB3, a silencing switch SB4, an ascending limit switch SQ1, a descending limit switch SQ2, a turn-in limit switch SQ3, a turn-out limit switch SQ4, a move-in limit switch SQ5 and a move-out limit switch SQ6, the signal output ends of the PLC respectively control a lifting motor M1, a rotating motor M2 and a moving motor M3 through a contactor KM1, a contactor KM2, a contactor KM3 and a contactor KM4, the lifting motor M1 is connected with an AC380V main power supply, moreover, the rotating motor M2 and the moving motor M3 are indirectly connected with the AC380V main power supply through a frequency converter VFD, and the signal output ends of the PLC are also connected with the data input control ends of the frequency converter VFD. The intelligent control system is simple in structure, is reasonably designed, is convenient to use, can realize automatic control, can increase the operation safety of a mechanical parking system, and has high practicability.