The invention relates to a fixing device for deeply processing pig trotter meat products. The fixing device comprises a fixing bracket, fixing guide rods and fixing mechanisms, wherein fixing sliding rails are respectively arranged at the left end and the right end of the fixing bracket; and the fixing mechanisms are located on the inner side of the fixing bracket, are in linear arrangement along the central axis of the corresponding fixing guide rod in equal spaces, and can move on the corresponding fixing guide rod. According to the fixing device disclosed by the invention, the extension movement of extruding push rods is used for driving two semicircular annular cylinder bodies in opposite arrangement on each fixing ring to do synchronous inward movement, so that pig trotters are clamped and fixed; and the number of the fixing rings is three, the fixing rings are sequentially and uniformly arranged from up to down, and the fixing rings are connected through connecting springs, so that the fixing rings are used for comprehensively clamping and fixing the pig trotters adopting an uneven cylinder structure, a phenomenon that the pig trotters slip is avoided, the clamping force is large, and the stability is high.