The invention relates to a hydraulic synchronous control mechanism with a compensation function. The hydraulic synchronous control mechanism with the compensation function is characterized by comprising a main operating loop and a compensation loop; the main operating loop comprises an oil cylinder, the oil cylinder is provided with a first hydraulic control one-way valve, a first overflow valve and a displacement sensor, and an oil inlet of the first hydraulic control one-way valve is connected with an oil opening of a control cavity of an electro-hydraulic reversing valve after sequentially passing through a first ball valve, a second hydraulic control one-way valve, a second overflow valve, a first one-way valve, a synchronous motor, a second throttling valve and a third throttling valve; the compensation loop is arranged between the first ball valve and the second hydraulic control one-way valve and comprises a first throttling valve, a third hydraulic control one-way valve and a first electromagnetic reversing valve, and the first throttling valve, the third hydraulic control one-way valve and the first electromagnetic reversing valve are sequentially connected. The hydraulic synchronous control mechanism with the compensation function which is disclosed by the invention has the characteristics that the structure is simple, the position of the oil cylinder is accurate, the synchronization precision is high, an electric control manner is simple, the use reliability is high, the safety of a system is remarkable, the maintenance is convenient and the like.