Anti-shock hydraulic release fishing spear

The utility model discloses an anti-shock hydraulic release fishing spear. The anti-shock hydraulic release fishing spear comprises a spear rod (1), the upper end of the spear rod is in threaded connection with the upper joint (2); the lower part of the spear rod is sleeved with a slip (3); the top end of the slip is in threaded connection with the slip seat (4); a lower limiting sleeve (5) is sleeved outside the slip bowl; the upper end of the lower limiting sleeve is in threaded connection with the lower end of a connecting sleeve (6); a salvage spring (10) is arranged in a gap between the top end of the slip and the lower end of the connecting sleeve; a middle sleeve (7) is arranged in an inner hole of the connecting sleeve; the upper end of the connecting sleeve is in threaded connection with an upper limiting sleeve (8); a piston (9), a balance spring (11) and a limiting ring (12) are sequentially arranged in a cavity between the upper limiting sleeve and the spear rod from bottom to top. And a return sp